Update controller.rst

Author: AurelienPillevesse

controller.rst

@@ -542,9 +542,7 @@ if you want to map a nested array of specific DTOs::
 .. tip::
 
     If using typed properties with `MapRequestPayload`, it's recommanded to use built-in types (like `int`, `bool`, `string`...) for mapping. Using custom types can expose your application implementation outside with errors during denormalization.
-    Validating an Enum in your `#[MapRequestPayload]` class should look like this:
-
-    .. code-block:: php
+    Validating an Enum in your `#[MapRequestPayload]` class should look like this::
 
         class LuckyController
         {