add checksum for menu sync

app/models/menu_item_attribute.rb

@@ -1,6 +1,6 @@
 class MenuItemAttribute < ApplicationRecord
   validates_presence_of :attribute_type, :name, :value
   def self.collection
-    MenuItemAttribute.select("name, value").map { |e| [e.name, e.value] }
+    MenuItemAttribute.select("name").map { |e| [e.name, e.name] }
   end
 end