Match host PHP version to Docker (8.2) to fix blackbox tests (#200)

composer install on the host (PHP 8.4) pulls doctrine/instantiator 2.x
which uses typed constants (PHP 8.3+ feature). Since the blackbox tests
run inside a PHP 8.2 Docker container, the mock of \Redis triggers a
parse error when loading doctrine/instantiator.

Use PHP 8.2 on the host so Composer resolves dependencies compatible
with the Docker runtime.

Signed-off-by: Simon Podlipsky <simon@podlipsky.net>

Author: simPod

.github/workflows/blackbox.yml

@@ -22,7 +22,7 @@ jobs:
       - name: Setup PHP
         uses: shivammathur/setup-php@v2
         with:
-          php-version: 8.4
+          php-version: 8.2
           coverage: none
       - name: Login to Docker Hub
         continue-on-error: true
@@ -41,6 +41,3 @@ jobs:
         run: docker compose run phpunit env ADAPTER=apcng vendor/bin/phpunit tests/Test/
       - name: Run Blackbox with Redis
         run: docker compose run phpunit env ADAPTER=redis vendor/bin/phpunit tests/Test/
-
-
-