update documentation for global batch actions

docs/crud/configuration.md

@@ -323,14 +323,15 @@ Do not use the same action in global and classic batch action.
 The callback can return a response. If not, the user will be redirect automatically. See the example below:
 
 ```php-inline
-use App\Core\Entity\EntityInterface;
+use App\Core\Entity\RepositoryQuery;
 use App\Core\Manager\EntityManager;
+use Symfony\Component\HttpFoundation\JsonResponse;
 
 $configuration->setGlobalBatchAction(
     'index',
     'export_json',
     'Export to JSON',
-    function(RepositoryQuery $query, EntityManager $manager, ?array $selection): ?Response {
+    function(RepositoryQuery $query, EntityManager $manager, ?array $selection): JsonResponse {
         $items = $selection ?? $query->find();
 
         return $this->json($items);