composer(deps): 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@v3.55.0...v3.56.0)

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

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

composer.json

@@ -33,7 +33,7 @@
   "require": {
     "php": "~8.1.0 || ~8.2.0 || ~8.3.0 || ~8.4.0",
     "dealerdirect/phpcodesniffer-composer-installer": "^1.0.0",
-    "friendsofphp/php-cs-fixer": "^v3.55.0",
+    "friendsofphp/php-cs-fixer": "^v3.56.0",
     "sirbrillig/phpcs-variable-analysis": "^2.11.18",
     "slevomat/coding-standard": "^8.15.0",
     "squizlabs/php_codesniffer": "^3.9.2"