Adding versionadded detail

Author: klaussilveira

book/security.rst

@@ -1084,6 +1084,9 @@ authorization from inside a controller::
 
 .. _book-security-securing-controller-annotations:
 
+.. versionadded:: 2.5
+    The ``createAccessDeniedException`` method was introduced in Symfony 2.5.
+
 The :method:`Symfony\\Bundle\\FrameworkBundle\\Controller\\Controller::createAccessDeniedException()` method creates a special :class:`Symfony\\Component\\Security\\Core\Exception\\AccessDeniedException`
 object, which ultimately triggers a 403 HTTP response inside Symfony.