Merge branch '6.3' into 6.4

* 6.3:
  Update serializer.rst

Author: OskarStark

components/serializer.rst

@@ -580,7 +580,7 @@ A custom name converter can handle such cases::
         public function denormalize(string $propertyName): string
         {
             // removes 'org_' prefix
-            return 'org_' === substr($propertyName, 0, 4) ? substr($propertyName, 4) : $propertyName;
+            return str_starts_with($propertyName, 'org_') ? substr($propertyName, 4) : $propertyName;
         }
     }