fix: show correct type options on invalid

Author: andrepimpao

src/Rule/Type.php

@@ -93,7 +93,7 @@ public function assert(mixed $value, ?string $name = null): void
             }
 
             if (!isset(self::TYPE_FUNCTIONS[$constraint]) && !\class_exists($constraint) && !\interface_exists($constraint)) {
-                throw new UnexpectedOptionException('constraint type', self::TYPE_FUNCTIONS, $constraint);
+                throw new UnexpectedOptionException('constraint type', \array_keys(self::TYPE_FUNCTIONS), $constraint);
             }
         }