Add feature categories to controllers beginning with N

app/controllers/notification_settings_controller.rb

@@ -3,6 +3,8 @@
 class NotificationSettingsController < ApplicationController
   before_action :authenticate_user!
 
+  feature_category :users
+
   def create
     return render_404 unless can_read?(resource)
 

spec/controllers/every_controller_spec.rb

@@ -26,7 +26,8 @@ RSpec.describe "Every controller" do
         next if controller.feature_category_for_action(action)
 
         next unless controller.to_s.start_with?('B', 'C', 'D', 'E', 'F',
-                                                'H', 'I', 'J',
+                                                'H', 'I', 'J', 'K', 'L',
+                                                'M', 'N',
                                                 'Projects::MergeRequestsController')
 
         "#{controller}##{action}"