Update controller.rst

Author: AurelienPillevesse

controller.rst

@@ -541,7 +541,7 @@ if you want to map a nested array of specific DTOs::
 
 .. tip::
 
-    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.
+    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.
 
 Managing the Session
 --------------------