Bump ergebnis/php-cs-fixer-config from 6.50.0 to 6.51.0

Bumps [ergebnis/php-cs-fixer-config](https://github.com/ergebnis/php-cs-fixer-config) from 6.50.0 to 6.51.0.
- [Release notes](https://github.com/ergebnis/php-cs-fixer-config/releases)
- [Changelog](https://github.com/ergebnis/php-cs-fixer-config/blob/main/CHANGELOG.md)
- [Commits](ergebnis/php-cs-fixer-config@6.50.0...6.51.0)

---
updated-dependencies:
- dependency-name: ergebnis/php-cs-fixer-config
  dependency-version: 6.51.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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Author: dependabot[bot]