Update security/voters.rst

Co-authored-by: Antoine M <amakdessi@me.com>

Author: ker0x

security/voters.rst

@@ -460,7 +460,7 @@ Changing the message and status code returned
 
 By default, the ``#[IsGranted]`` attribute will throw a
 :class:`Symfony\\Component\\Security\\Core\\Exception\\AccessDeniedException`
-and return a **403** status code with **Access Denied** as message.
+and return an http **403** status code with **Access Denied** as message.
 
 However, you can change this behavior by specifying the message and status code returned::