docs($route): change routes property to correct type

change $route.routes property type to Object, property is marked incorrectly as an Array

Closes #6552

src/ngRoute/route.js

@@ -247,7 +247,7 @@ function $RouteProvider(){
      *     - `$scope` - The current route scope.
      *     - `$template` - The current route template HTML.
      *
-     * @property {Array.<Object>} routes Array of all configured routes.
+     * @property {Object} routes Object with all route configuration Objects as its properties.
      *
      * @description
      * `$route` is used for deep-linking URLs to controllers and views (HTML partials).