[PHP]: Update friendsofphp/php-cs-fixer requirement in /vendor-bin/phpcs

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@v3.54.0...v3.55.0)

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

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

vendor-bin/phpcs/composer.json

@@ -1,6 +1,6 @@
 {
     "require-dev": {
-        "friendsofphp/php-cs-fixer": "3.54.0",
+        "friendsofphp/php-cs-fixer": "3.55.0",
         "serendipity_hq/phpcs-config": "1.2.5"
     }
 }