Update friendsofphp/php-cs-fixer requirement from ^3.90 to ^3.91 (#170)

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

composer.json

@@ -20,7 +20,7 @@
         "phpstan/phpstan": "^2.0"
     },
     "require-dev": {
-        "friendsofphp/php-cs-fixer": "^3.90",
+        "friendsofphp/php-cs-fixer": "^3.91",
         "nikic/php-parser": "^5.6",
         "phpstan/extension-installer": "^1.4",
         "phpstan/phpstan-deprecation-rules": "^2",