fixed attachment saving bug

app/controllers/admin/question_controller.rb

@@ -62,7 +62,7 @@ module Admin
 
       def question_params
         params.require(:question).permit(
-          :quiz_id, :question, :category, :input_type, :sort, :active, :input_options,
+          :quiz_id, :question, :category, :attachment, :input_type, :sort, :active, :input_options,
           multi_choice: [], live_code: [:later, :html, :css, :js, :text]
         )
       end