Explicitly disable offending cop

There's some bug with Rubocop that even though `on` is
specified as allowed parameter name, rubocop still complains

Author: chaimann

admin/app/helpers/solidus_admin/stimulus_helper.rb

@@ -10,7 +10,7 @@ def stimulus_controller
       { "data-controller": stimulus_id }
     end
 
-    def stimulus_action(action, on: nil)
+    def stimulus_action(action, on: nil) # rubocop:disable Naming/MethodParameterName
       action_construct = []
       action_construct << "#{on}->" if on.present?
       action_construct << "#{stimulus_id}##{action}"