Bump the frontend group with 3 updates (#632)

Bumps the frontend group with 3 updates: [@double-great/stylelint-a11y](https://github.com/double-great/stylelint-a11y), [postcss](https://github.com/postcss/postcss) and [stylelint](https://github.com/stylelint/stylelint).


Updates `@double-great/stylelint-a11y` from 3.0.2 to 3.0.3
- [Release notes](https://github.com/double-great/stylelint-a11y/releases)
- [Commits](double-great/stylelint-a11y@v3.0.2...v3.0.3)

Updates `postcss` from 8.4.49 to 8.5.1
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](postcss/postcss@8.4.49...8.5.1)

Updates `stylelint` from 16.12.0 to 16.14.1
- [Release notes](https://github.com/stylelint/stylelint/releases)
- [Changelog](https://github.com/stylelint/stylelint/blob/main/CHANGELOG.md)
- [Commits](stylelint/stylelint@16.12.0...16.14.1)

---
updated-dependencies:
- dependency-name: "@double-great/stylelint-a11y"
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: frontend
- dependency-name: postcss
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: frontend
- dependency-name: stylelint
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: frontend
...

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