DX: rector rules upt to PHP 74

src/Bundle/ChillCustomFieldsBundle/Form/DataTransformer/JsonCustomFieldToArrayTransformer.php

@@ -38,9 +38,7 @@ class JsonCustomFieldToArrayTransformer implements DataTransformerInterface
 
         // @TODO: in the array_map callback, CustomField::getLabel() does not exist. What do we do here?
         $customFieldsLablels = array_map(
-            static function ($e) {
-                return $e->getLabel();
-            },
+            static fn($e) => $e->getLabel(),
             $customFields
         );