fix(deps): update dependency idna to v3.18

[elastic-renovate-prod]

This PR contains the following updates:

Package	Change	Age	Confidence
idna (changelog)	3.15 → 3.18

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Release Notes

kjd/idna (idna)

v3.18

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• When decoding a domain, add a display argument that will pass
  through invalid labels rather than raising an exception.

v3.17

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• Substantial 75% reduction in memory usage through new data
  structures and some optimization in processing speed.
• Added a general 1024-character input length cap to the public
  validation, conversion, and codec entry points. This is well above
  any legitimate domain or label and guards against pathological
  inputs.

v3.16

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• Add a command-line interface (python -m idna, also available as
  the idna script). Encodes or decodes one or more domains supplied
  as arguments or on standard input, with options to select A-label
  or U-label output and control error handling.
• Raise the minimum supported Python version to 3.9
• Various code quality improvements

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