Adjust constraint.

Author: dereuromark

composer.json

@@ -12,7 +12,7 @@
     ],
     "require": {
         "php": ">=8.1.0",
-        "phpstan/phpstan": "^2.0",
+        "phpstan/phpstan": "^2.1",
         "cakephp/cakephp": "^5.0"
     },
     "require-dev": {