Bump the dependencies group with 2 updates (#2030)

Bumps the dependencies group with 2 updates: [phpro/grumphp](https://github.com/phpro/grumphp) and [phpstan/phpstan](https://github.com/phpstan/phpstan-phar-composer-source).


Updates `phpro/grumphp` from 2.22.0 to 2.23.0
- [Release notes](https://github.com/phpro/grumphp/releases)
- [Commits](phpro/grumphp@v2.22.0...v2.23.0)

Updates `phpstan/phpstan` from 2.2.5 to 2.2.6
- [Commits](https://github.com/phpstan/phpstan-phar-composer-source/commits)

---
updated-dependencies:
- dependency-name: phpro/grumphp
  dependency-version: 2.23.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: dependencies
- dependency-name: phpstan/phpstan
  dependency-version: 2.2.6
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: dependencies
...

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Author: dependabot[bot]