Fix idn_to_ascii deprecation warning by using INTL_IDNA_VARIANT_UTS46 (#887)

`idn_to_ascii()` in
`FormatConstraint::validateInternationalizedHostname()` was implicitly
using the deprecated `INTL_IDNA_VARIANT_2003`, causing deprecation
warnings in PHP 8.x.

## Change

Explicitly specify `INTL_IDNA_VARIANT_UTS46` variant:

```php
// Before
$ascii = idn_to_ascii($label);

// After  
$ascii = idn_to_ascii($label, IDNA_DEFAULT, INTL_IDNA_VARIANT_UTS46);
```

Behavior is unchanged - internationalized hostnames validate identically
under UTS46.

> [!WARNING]
>
> <details>
> <summary>Firewall rules blocked me from connecting to one or more
addresses (expand for details)</summary>
>
> #### I tried to connect to the following addresses, but was blocked by
firewall rules:
>
> -
`https://api.github.com/repos/FriendsOfPHP/PHP-CS-Fixer/zipball/0ad2f84130e8fec8655682532e6d39553054831c`
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/Iust2w /usr/bin/composer install --no-interaction` (http block)
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
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`https://api.github.com/repos/PHP-CS-Fixer/diff/zipball/29dc0d507e838c4580d018bd8b5cb412474f7ec3`
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/Iust2w /usr/bin/composer install --no-interaction` (http block)
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
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`https://api.github.com/repos/composer/pcre/zipball/67a32d7d6f9f560b726ab25a061b38ff3a80c560`
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/Iust2w /usr/bin/composer install --no-interaction` (http block)
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
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/https---github.sh` (http block)
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`https://api.github.com/repos/composer/semver/zipball/198166618906cb2de69b95d7d47e5fa8aa1b2b95`
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/Iust2w /usr/bin/composer install --no-interaction` (http block)
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
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`https://api.github.com/repos/composer/xdebug-handler/zipball/9e36aeed4616366d2b690bdce11f71e9178c579a`
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/Iust2w /usr/bin/composer install --no-interaction` (http block)
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
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`https://api.github.com/repos/doctrine/annotations/zipball/253dca476f70808a5aeed3a47cc2cc88c5cab915`
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/Iust2w /usr/bin/composer install --no-interaction` (http block)
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
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> -
`https://api.github.com/repos/doctrine/deprecations/zipball/d4fe3e6fd9bb9e72557a19674f44d8ac7db4c6ca`
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
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> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
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> -
`https://api.github.com/repos/doctrine/instantiator/zipball/0a0fa9780f5d4e507415a065172d26a98d02047b`
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/Iust2w /usr/bin/composer install --no-interaction` (http block)
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
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> -
`https://api.github.com/repos/doctrine/lexer/zipball/861c870e8b75f7c8f69c146c7f89cc1c0f1b49b6`
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/Iust2w /usr/bin/composer install --no-interaction` (http block)
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
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> -
`https://api.github.com/repos/marc-mabe/php-enum-phpstan/zipball/63d391c16e3a7753bb928f61d1989438ee63eebc`
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/Iust2w /usr/bin/composer install --no-interaction` (http block)
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
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/https---github.sh` (http block)
> -
`https://api.github.com/repos/marc-mabe/php-enum/zipball/bb426fcdd65c60fb3638ef741e8782508fda7eef`
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
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> -
`https://api.github.com/repos/myclabs/DeepCopy/zipball/07d290f0c47959fd5eed98c95ee5602db07e0b6a`
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/Iust2w /usr/bin/composer install --no-interaction` (http block)
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
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> -
`https://api.github.com/repos/phar-io/manifest/zipball/54750ef60c58e43759730615a392c31c80e23176`
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/Iust2w /usr/bin/composer install --no-interaction` (http block)
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
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> -
`https://api.github.com/repos/phar-io/version/zipball/4f7fd7836c6f332bb2933569e566a0d6c4cbed74`
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/Iust2w /usr/bin/composer install --no-interaction` (http block)
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
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/https---github.sh` (http block)
> -
`https://api.github.com/repos/php-fig/cache/zipball/aa5030cfa5405eccfdcb1083ce040c2cb8d253bf`
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/Iust2w /usr/bin/composer install --no-interaction` (http block)
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
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/https---github.sh` (http block)
> -
`https://api.github.com/repos/php-fig/container/zipball/c71ecc56dfe541dbd90c5360474fbc405f8d5963`
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/Iust2w /usr/bin/composer install --no-interaction` (http block)
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
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/https---github.sh` (http block)
> -
`https://api.github.com/repos/php-fig/event-dispatcher/zipball/dbefd12671e8a14ec7f180cab83036ed26714bb0`
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/Iust2w /usr/bin/composer install --no-interaction` (http block)
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
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> -
`https://api.github.com/repos/php-fig/log/zipball/ef29f6d262798707a9edd554e2b82517ef3a9376`
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/Iust2w /usr/bin/composer install --no-interaction` (http block)
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
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> -
`https://api.github.com/repos/phpDocumentor/ReflectionCommon/zipball/1d01c49d4ed62f25aa84a747ad35d5a16924662b`
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/Iust2w /usr/bin/composer install --no-interaction` (http block)
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
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/https---github.sh` (http block)
> -
`https://api.github.com/repos/phpDocumentor/ReflectionDocBlock/zipball/5cee1d3dfc2d2aa6599834520911d246f656bcb8`
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/Iust2w /usr/bin/composer install --no-interaction` (http block)
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
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> -
`https://api.github.com/repos/phpDocumentor/TypeResolver/zipball/92a98ada2b93d9b201a613cb5a33584dde25f195`
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/Iust2w /usr/bin/composer install --no-interaction` (http block)
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
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/https---github.sh` (http block)
> -
`https://api.github.com/repos/phpspec/prophecy/zipball/7ab965042096282307992f1b9abff020095757f0`
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/Iust2w /usr/bin/composer install --no-interaction` (http block)
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
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> -
`https://api.github.com/repos/phpstan/phpdoc-parser/zipball/a004701b11273a26cd7955a61d67a7f1e525a45a`
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/Iust2w /usr/bin/composer install --no-interaction` (http block)
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
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> -
`https://api.github.com/repos/phpstan/phpstan/zipball/2770dcdf5078d0b0d53f94317e06affe88419aa8`
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> -
`https://api.github.com/repos/sebastianbergmann/code-unit-reverse-lookup/zipball/92a1a52e86d34cde6caa54f1b5ffa9fda18e5d54`
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
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> -
`https://api.github.com/repos/sebastianbergmann/comparator/zipball/bc7d8ac2fe1cce229bff9b5fd4efe65918a1ff52`
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/Iust2w /usr/bin/composer install --no-interaction` (http block)
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> -
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> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/Iust2w /usr/bin/composer install --no-interaction` (http block)
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> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/Iust2w /usr/bin/composer install --no-interaction` (http block)
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> -
`https://api.github.com/repos/sebastianbergmann/exporter/zipball/64cfeaa341951ceb2019d7b98232399d57bb2296`
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/Iust2w /usr/bin/composer install --no-interaction` (http block)
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`https://api.github.com/repos/sebastianbergmann/global-state/zipball/800689427e3e8cf57a8fe38fcd1d4344c9b2f046`
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
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> -
`https://api.github.com/repos/sebastianbergmann/object-enumerator/zipball/ac5b293dba925751b808e02923399fb44ff0d541`
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/Iust2w /usr/bin/composer install --no-interaction` (http block)
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
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> -
`https://api.github.com/repos/sebastianbergmann/object-reflector/zipball/1d439c229e61f244ff1f211e5c99737f90c67def`
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/Iust2w /usr/bin/composer install --no-interaction` (http block)
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> -
`https://api.github.com/repos/sebastianbergmann/php-code-coverage/zipball/40a4ed114a4aea5afd6df8d0f0c9cd3033097f66`
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/Iust2w /usr/bin/composer install --no-interaction` (http block)
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> -
`https://api.github.com/repos/sebastianbergmann/php-file-iterator/zipball/69deeb8664f611f156a924154985fbd4911eb36b`
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/Iust2w /usr/bin/composer install --no-interaction` (http block)
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/PU9imN /usr/bin/composer install --no-interaction --prefer-dist
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> -
`https://api.github.com/repos/sebastianbergmann/php-text-template/zipball/31f8b717e51d9a2afca6c9f046f5d69fc27c8686`
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/Iust2w /usr/bin/composer install --no-interaction` (http block)
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/tmp/PU9imN /usr/bin/composer install --no-interaction --prefer-dist
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> -
`https://api.github.com/repos/sebastianbergmann/php-timer/zipball/a691211e94ff39a34811abd521c31bd5b305b0bb`
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/Iust2w /usr/bin/composer install --no-interaction` (http block)
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/tmp/PU9imN /usr/bin/composer install --no-interaction --prefer-dist
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> -
`https://api.github.com/repos/sebastianbergmann/php-token-stream/zipball/a853a0e183b9db7eed023d7933a858fa1c8d25a3`
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/Iust2w /usr/bin/composer install --no-interaction` (http block)
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/tmp/PU9imN /usr/bin/composer install --no-interaction --prefer-dist
/https---github.sh` (http block)
> -
`https://api.github.com/repos/sebastianbergmann/phpunit/zipball/1015741814413c156abb0f53d7db7bbd03c6e858`
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/Iust2w /usr/bin/composer install --no-interaction` (http block)
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/PU9imN /usr/bin/composer install --no-interaction --prefer-dist
/https---github.sh` (http block)
> -
`https://api.github.com/repos/sebastianbergmann/recursion-context/zipball/8fe7e75986a9d24b4cceae847314035df7703a5a`
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/Iust2w /usr/bin/composer install --no-interaction` (http block)
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> -
`https://api.github.com/repos/sebastianbergmann/resource-operations/zipball/72a7f7674d053d548003b16ff5a106e7e0e06eee`
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/Iust2w /usr/bin/composer install --no-interaction` (http block)
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/PU9imN /usr/bin/composer install --no-interaction --prefer-dist
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> -
`https://api.github.com/repos/sebastianbergmann/type/zipball/18f071c3a29892b037d35e6b20ddf3ea39b42874`
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/Iust2w /usr/bin/composer install --no-interaction` (http block)
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> -
`https://api.github.com/repos/sebastianbergmann/version/zipball/99732be0ddb3361e16ad77b68ba41efc8e979019`
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/Iust2w /usr/bin/composer install --no-interaction` (http block)
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`https://api.github.com/repos/symfony/console/zipball/c4ba980ca61a9eb18ee6bcc73f28e475852bb1ed`
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> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/PU9imN /usr/bin/composer install --no-interaction --prefer-dist
/https---github.sh` (http block)
> -
`https://api.github.com/repos/symfony/deprecation-contracts/zipball/63afe740e99a13ba87ec199bb07bbdee937a5b62`
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/Iust2w /usr/bin/composer install --no-interaction` (http block)
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/PU9imN /usr/bin/composer install --no-interaction --prefer-dist
/https---github.sh` (http block)
> -
`https://api.github.com/repos/symfony/event-dispatcher-contracts/zipball/59eb412e93815df44f05f342958efa9f46b1e586`
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/Iust2w /usr/bin/composer install --no-interaction` (http block)
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/PU9imN /usr/bin/composer install --no-interaction --prefer-dist
/https---github.sh` (http block)
> -
`https://api.github.com/repos/symfony/event-dispatcher/zipball/72982eb416f61003e9bb6e91f8b3213600dcf9e9`
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/Iust2w /usr/bin/composer install --no-interaction` (http block)
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/PU9imN /usr/bin/composer install --no-interaction --prefer-dist
/https---github.sh` (http block)
> -
`https://api.github.com/repos/symfony/filesystem/zipball/57c8294ed37d4a055b77057827c67f9558c95c54`
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/Iust2w /usr/bin/composer install --no-interaction` (http block)
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/PU9imN /usr/bin/composer install --no-interaction --prefer-dist
/https---github.sh` (http block)
> -
`https://api.github.com/repos/symfony/finder/zipball/63741784cd7b9967975eec610b256eed3ede022b`
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/Iust2w /usr/bin/composer install --no-interaction` (http block)
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/PU9imN /usr/bin/composer install --no-interaction --prefer-dist
/https---github.sh` (http block)
> -
`https://api.github.com/repos/symfony/options-resolver/zipball/74e5b6f0db3e8589e6cfd5efb317a1fc2bb52fb6`
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/Iust2w /usr/bin/composer install --no-interaction` (http block)
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/PU9imN /usr/bin/composer install --no-interaction --prefer-dist
/https---github.sh` (http block)
> -
`https://api.github.com/repos/symfony/polyfill-ctype/zipball/a3cc8b044a6ea513310cbd48ef7333b384945638`
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/Iust2w /usr/bin/composer install --no-interaction` (http block)
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/PU9imN /usr/bin/composer install --no-interaction --prefer-dist
/https---github.sh` (http block)
> -
`https://api.github.com/repos/symfony/polyfill-intl-grapheme/zipball/380872130d3a5dd3ace2f4010d95125fde5d5c70`
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/Iust2w /usr/bin/composer install --no-interaction` (http block)
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/PU9imN /usr/bin/composer install --no-interaction --prefer-dist
/https---github.sh` (http block)
> -
`https://api.github.com/repos/symfony/polyfill-intl-normalizer/zipball/3833d7255cc303546435cb650316bff708a1c75c`
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/Iust2w /usr/bin/composer install --no-interaction` (http block)
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/PU9imN /usr/bin/composer install --no-interaction --prefer-dist
/https---github.sh` (http block)
> -
`https://api.github.com/repos/symfony/polyfill-mbstring/zipball/6d857f4d76bd4b343eac26d6b539585d2bc56493`
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/Iust2w /usr/bin/composer install --no-interaction` (http block)
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/PU9imN /usr/bin/composer install --no-interaction --prefer-dist
/https---github.sh` (http block)
> -
`https://api.github.com/repos/symfony/polyfill-php73/zipball/0f68c03565dcaaf25a890667542e8bd75fe7e5bb`
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/Iust2w /usr/bin/composer install --no-interaction` (http block)
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/PU9imN /usr/bin/composer install --no-interaction --prefer-dist
/https---github.sh` (http block)
> -
`https://api.github.com/repos/symfony/polyfill-php80/zipball/0cc9dd0f17f61d8131e7df6b84bd344899fe2608`
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/Iust2w /usr/bin/composer install --no-interaction` (http block)
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/PU9imN /usr/bin/composer install --no-interaction --prefer-dist
/https---github.sh` (http block)
> -
`https://api.github.com/repos/symfony/polyfill-php81/zipball/4a4cfc2d253c21a5ad0e53071df248ed48c6ce5c`
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/Iust2w /usr/bin/composer install --no-interaction` (http block)
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/PU9imN /usr/bin/composer install --no-interaction --prefer-dist
/https---github.sh` (http block)
> -
`https://api.github.com/repos/symfony/process/zipball/467bfc56f18f5ef6d5ccb09324d7e988c1c0a98f`
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/Iust2w /usr/bin/composer install --no-interaction` (http block)
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/PU9imN /usr/bin/composer install --no-interaction --prefer-dist
/https---github.sh` (http block)
> -
`https://api.github.com/repos/symfony/service-contracts/zipball/45112560a3ba2d715666a509a0bc9521d10b6c43`
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/Iust2w /usr/bin/composer install --no-interaction` (http block)
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/PU9imN /usr/bin/composer install --no-interaction --prefer-dist
/https---github.sh` (http block)
> -
`https://api.github.com/repos/symfony/stopwatch/zipball/fb2c199cf302eb207f8c23e7ee174c1c31a5c004`
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/Iust2w /usr/bin/composer install --no-interaction` (http block)
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/PU9imN /usr/bin/composer install --no-interaction --prefer-dist
/https---github.sh` (http block)
> -
`https://api.github.com/repos/symfony/string/zipball/50590a057841fa6bf69d12eceffce3465b9e32cb`
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/Iust2w /usr/bin/composer install --no-interaction` (http block)
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/PU9imN /usr/bin/composer install --no-interaction --prefer-dist
/https---github.sh` (http block)
> -
`https://api.github.com/repos/theseer/tokenizer/zipball/b7489ce515e168639d17feec34b8847c326b0b3c`
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/Iust2w /usr/bin/composer install --no-interaction` (http block)
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/PU9imN /usr/bin/composer install --no-interaction --prefer-dist
/https---github.sh` (http block)
> -
`https://api.github.com/repos/webmozarts/assert/zipball/6976757ba8dd70bf8cbaea0914ad84d8b51a9f46`
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/Iust2w /usr/bin/composer install --no-interaction` (http block)
> - Triggering command: `/usr/bin/php8.3 /usr/bin/php8.3 -n -c
/tmp/PU9imN /usr/bin/composer install --no-interaction --prefer-dist
/https---github.sh` (http block)
> - `www.php.net`
> - Triggering command:
`/home/REDACTED/work/_temp/ghcca-node/node/bin/node
/home/REDACTED/work/_temp/ghcca-node/node/bin/node --enable-source-maps
/home/REDACTED/work/_temp/copilot-developer-action-main/dist/index.js`
(dns block)
>
> If you need me to access, download, or install something from one of
these locations, you can either:
>
> - Configure [Actions setup
steps](https://gh.io/copilot/actions-setup-steps) to set up my
environment, which run before the firewall is enabled
> - Add the appropriate URLs or hosts to the custom allowlist in this
repository's [Copilot coding agent
settings](https://github.com/jsonrainbow/json-schema/settings/copilot/coding_agent)
(admins only)
>
> </details>

<!-- START COPILOT ORIGINAL PROMPT -->



<details>

<summary>Original prompt</summary>

> 
> ----
> 
> *This section details on the original issue you should resolve*
> 
> <issue_title>Deprecation warning in
src/JsonSchema/Constraints/Drafts/Draft07/FormatConstraint.php on line
281</issue_title>
> <issue_description>The output of phpunit shows the following
deprecation
> ```
> PHP Deprecated: idn_to_ascii(): INTL_IDNA_VARIANT_2003 is deprecated
in
/home/runner/work/json-schema/json-schema/src/JsonSchema/Constraints/Drafts/Draft07/FormatConstraint.php
on line 281
> ```
> 
> This should be address as per PHP recommendations whilst the test
still remain green.</issue_description>
> 
> <agent_instructions>Check the PHP website for the recommended update
to the deprecation</agent_instructions>
> 
> ## Comments on the Issue (you are @copilot in this section)
> 
> <comments>
> </comments>
> 


</details>



<!-- START COPILOT CODING AGENT SUFFIX -->

- Fixes #886

<!-- START COPILOT CODING AGENT TIPS -->
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Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: DannyvdSluijs <618940+DannyvdSluijs@users.noreply.github.com>

Author: Copilot

src/JsonSchema/Constraints/Drafts/Draft07/FormatConstraint.php

@@ -278,7 +278,7 @@ private function validateInternationalizedHostname(string $host): bool
                 return false;
             }
 
-            $ascii = idn_to_ascii($label);
+            $ascii = idn_to_ascii($label, IDNA_DEFAULT, INTL_IDNA_VARIANT_UTS46);
             if ($ascii === false) {
                 return false;
             }