chore(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/v3.21.1/CHANGELOG.md)
- [Commits](PHP-CS-Fixer/PHP-CS-Fixer@v3.20.0...v3.21.1)

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

Signed-off-by: dependabot[bot] <[email protected]>

composer.json

@@ -44,7 +44,7 @@
     },
     "require-dev": {
         "ext-pdo_sqlite": "*",
-        "friendsofphp/php-cs-fixer": "3.20.0",
+        "friendsofphp/php-cs-fixer": "3.21.1",
         "laravel/legacy-factories": "^1.0",
         "mfn/php-cs-fixer-config": "^2",
         "mockery/mockery": "^1.2",