[test] Test pin PHPStan 2.1.34

Author: samsonasik

composer.json

@@ -8,7 +8,7 @@
     },
     "require-dev": {
         "phpstan/extension-installer": "^1.4",
-        "phpstan/phpstan": "^2.1.33",
+        "phpstan/phpstan": "2.1.34",
         "phpstan/phpstan-webmozart-assert": "^2.0",
         "phpunit/phpunit": "^11.5",
         "rector/jack": "^0.5.1",