Update advanced_configuration.rst

Resources/doc/reference/advanced_configuration.rst

@@ -236,7 +236,7 @@ Tab Menu
 --------
 
 ACL
-^^^^^^^^^
+^^^
 
 Though the route linked my a menu may be protected the Tab Menu will not automatically check the ACl for you.
 The link will still appear unless you manually check it using the `isGranted` method: