feat: ニコニコ連携先をニコタグにできないやぅに修正（#142） (#144)

Merge branch 'main' into feature/142

Merge branch 'main' into feature/142

#142 完了

Co-authored-by: miteruzo <miteruzo@naver.com>
Reviewed-on: #144

backend/app/models/nico_tag_relation.rb

@@ -6,6 +6,7 @@ class NicoTagRelation < ApplicationRecord
   validates :tag_id, presence: true
 
   validate :nico_tag_must_be_nico
+  validate :tag_mustnt_be_nico
 
   private