chore: fix cgl issues flagged by phpstan

src/Menu/AbstractMenuBuilder.php

@@ -24,6 +24,9 @@ abstract class AbstractMenuBuilder
         return $this->factory->createItem('root');
     }
 
+    /**
+     * @return array<string, mixed>
+     */
     protected function getDefaultRouteParameters(string $parameter = 'id', string $default = '0'): array
     {
         $request = $this->requestStack->getMainRequest();