update routes to redraw instead of append

Author: darreneid

config/routes.rb

@@ -1,9 +1,9 @@
 # frozen_string_literal: true
 
 CommunityCustomFields::Engine.routes.draw do
-  put '/:topic_id' => 'custom_fields#update', as: 'custom_field'
+  put '/:topic_id' => 'custom_fields#update'
 end
 
-Discourse::Application.routes.append do
+Discourse::Application.routes.draw do
   mount ::CommunityCustomFields::Engine, at: '/admin/plugins/community-custom-fields'
 end