minor #7853 Update Title in controller.rst (tomgrandy)

This PR was submitted for the 3.2 branch but it was merged into the 2.7 branch instead (closes #7853).

Discussion
----------

Update Title in controller.rst

Capitalize the word "other" in a title.

Commits
-------

e6f83c4 Update Title in controller.rst

Author: weaverryan

controller.rst

@@ -237,7 +237,7 @@ The Symfony templating system and Twig are explained more in the
 
 .. _controller-accessing-services:
 
-Accessing other Services
+Accessing Other Services
 ~~~~~~~~~~~~~~~~~~~~~~~~
 
 Symfony comes packed with a lot of useful objects, called *services*. These