Bump the dependencies group with 1 update (#1657)

Bumps the dependencies group with 1 update: [phpro/grumphp](https://github.com/phpro/grumphp).


Updates `phpro/grumphp` from 2.3.0 to 2.4.0
- [Release notes](https://github.com/phpro/grumphp/releases)
- [Commits](phpro/grumphp@v2.3.0...v2.4.0)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>