minor #3667 Update index.rst (NAYZO)

This PR was submitted for the 2.4 branch but it was merged into the 2.3 branch instead (closes #3667).

Discussion
----------

Update index.rst

Commits
-------

f1ee6c2 Update index.rst

cookbook/controller/service.rst

@@ -96,7 +96,7 @@ To refer to a controller that's defined as a service, use the single colon (:)
 notation. For example, to forward to the ``indexAction()`` method of the service
 defined above with the id ``acme.hello.controller``::
 
-    $this->forward('acme.hello.controller:indexAction');
+    $this->forward('acme.hello.controller:indexAction', array('name' => $name));
 
 .. note::