Bump the dev-dependencies group across 1 directory with 2 updates

Bumps the dev-dependencies group with 2 updates in the /composer/helpers/v2 directory: [friendsofphp/php-cs-fixer](https://github.com/PHP-CS-Fixer/PHP-CS-Fixer) and [phpstan/phpstan](https://github.com/phpstan/phpstan-phar-composer-source).


Updates `friendsofphp/php-cs-fixer` from 3.95.18 to 3.95.21
- [Release notes](https://github.com/PHP-CS-Fixer/PHP-CS-Fixer/releases)
- [Changelog](https://github.com/PHP-CS-Fixer/PHP-CS-Fixer/blob/master/CHANGELOG.md)
- [Commits](https://github.com/PHP-CS-Fixer/PHP-CS-Fixer/compare/v3.95.18...v3.95.21)

Updates `phpstan/phpstan` from 2.2.8 to 2.2.9
- [Commits](https://github.com/phpstan/phpstan-phar-composer-source/commits)

---
updated-dependencies:
- dependency-name: friendsofphp/php-cs-fixer
  dependency-version: 3.95.21
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: dev-dependencies
- dependency-name: phpstan/phpstan
  dependency-version: 2.2.9
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: dev-dependencies
...

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