build(deps): bump php-actions/phpunit in the github-actions group (#153)

Bumps the github-actions group with 1 update: [php-actions/phpunit](https://github.com/php-actions/phpunit).


Updates `php-actions/phpunit` from 3 to 4
- [Release notes](https://github.com/php-actions/phpunit/releases)
- [Commits](php-actions/phpunit@v3...v4)

---
updated-dependencies:
- dependency-name: php-actions/phpunit
  dependency-version: '4'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: github-actions
...

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

Author: dependabot[bot]

.github/workflows/phpunit.yml

@@ -25,7 +25,7 @@ jobs:
       - uses: php-actions/composer@v6
 
       - name: PHPUnit Tests
-        uses: php-actions/phpunit@v3
+        uses: php-actions/phpunit@v4
         with:
           version: 9
           php_extensions: xdebug