tools(deps-dev): Update friendsofphp/php-cs-fixer requirement

Updates the requirements on [friendsofphp/php-cs-fixer](https://github.com/PHP-CS-Fixer/PHP-CS-Fixer) to permit the latest version.
- [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](PHP-CS-Fixer/PHP-CS-Fixer@v3.89.2...v3.91.0)

---
updated-dependencies:
- dependency-name: friendsofphp/php-cs-fixer
  dependency-version: 3.91.0
  dependency-type: direct:development
...

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

Author: dependabot[bot]

tools/php-cs-fixer/composer.json

@@ -6,7 +6,7 @@
         "php": "^8.1.31"
     },
     "require-dev": {
-        "friendsofphp/php-cs-fixer": "3.89.2",
+        "friendsofphp/php-cs-fixer": "3.91.0",
         "roave/security-advisories": "dev-latest"
     },
     "prefer-stable": true,