update psalm to v6

Author: michalsn

composer.json

@@ -35,7 +35,7 @@
         "phpunit/phpunit": "^10.5 || ^11.5",
         "rector/rector": "^2.0",
         "roave/security-advisories": "dev-latest",
-        "vimeo/psalm": "^5.0"
+        "vimeo/psalm": "^6.0"
     },
     "require-dev": {
         "codeigniter4/framework": "^4.1",