fix(frontend): リアクション変更時に古いリアクションが削除されないことがある問題の修正

[4ster1sk]

What

fix #896

Why

Additional info (optional)

Checklist

• コントリビューションガイドを読みました( Read the contribution guide)
• ローカル環境で動作しました(Test working in a local environment)
• (必要なら)CHANGELOG_YOJO.mdの更新((If needed) Update CHANGELOG_YOJO.md)
• (必要なら)テストの追加((If possible) Add tests)

[codecov]

Codecov Report

❌ Patch coverage is 97.61905% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 19.22%. Comparing base (0d758d1) to head (58c6eb9).
⚠️ Report is 3 commits behind head on develop.

Files with missing lines	Patch %	Lines
...ackages/frontend/src/components/MkNoteDetailed.vue	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #898      +/-   ##
===========================================
+ Coverage    19.20%   19.22%   +0.02%     
===========================================
  Files          954      954              
  Lines        97008    97037      +29     
  Branches      1428     1428              
===========================================
+ Hits         18628    18657      +29     
  Misses       78373    78373              
  Partials         7        7              

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[4ster1sk]

「:hogehoge:のリアクションを取り消しますか」とか「:hogehoge:のリアクションに変更しますか」に表示できるようにしようかと思ったけどまぁそっちは別PRかなあ

[kozakura913]

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