Fixed configuration example for defunct redirect

RoutingAuto defunct redirect configuration example uses class instead of type

| Q             | A
| ------------- | ---
| Doc fix?      | yes
| New docs?     | no
| Applies to    | 1.0
| Fixed tickets | n/a
Forgive me if I am wrong, but it looks like cmf_routing.redirect_controller expects a RedirectRouteInterface as its argument, and this would pass in an AutoRoute. Would you need to make your own controller for this?

https://github.com/symfony-cmf/RoutingBundle/blob/master/Controller/RedirectController.php#L49