[TASK] Update PHPStan (#1641)

Author: oliverklee

composer.json

@@ -48,7 +48,7 @@
         "php-parallel-lint/php-parallel-lint": "1.4.0",
         "phpmd/phpmd": "2.15.0",
         "phpstan/extension-installer": "1.4.3",
-        "phpstan/phpstan": "1.12.33 || 2.2.7",
+        "phpstan/phpstan": "1.12.33 || 2.2.9",
         "phpstan/phpstan-deprecation-rules": "1.2.1 || 2.0.5",
         "phpstan/phpstan-phpunit": "1.4.2 || 2.0.18",
         "phpstan/phpstan-strict-rules": "1.6.2 || 2.0.12",