composer(deps-dev): bump ergebnis/php-cs-fixer-config

Bumps [ergebnis/php-cs-fixer-config](https://github.com/ergebnis/php-cs-fixer-config) from 6.37.0 to 6.39.0.
- [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@6.37.0...6.39.0)

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

Signed-off-by: dependabot[bot] <support@github.com>

composer.json

@@ -28,7 +28,7 @@
     "ergebnis/composer-normalize": "^2.44.0",
     "ergebnis/data-provider": "^3.4.0",
     "ergebnis/license": "^2.6.0",
-    "ergebnis/php-cs-fixer-config": "^6.37.0",
+    "ergebnis/php-cs-fixer-config": "^6.39.0",
     "ergebnis/phpunit-slow-test-detector": "^2.17.0",
     "fakerphp/faker": "^1.24.0",
     "infection/infection": "~0.26.6",