fix(backend): following/invalidateでフォロワーを解除しようとしているユーザーの情報を返すように

[1673beta]

What

following/invalidateのレスポンスでフォロワーを解除しようとしているユーザーではなく自分の情報が返ってくる問題を修正

Why

fix #12095

Additional info (optional)

Checklist

• Read the contribution guide
• Test working in a local environment
• (If needed) Add story of storybook
• (If needed) Update CHANGELOG.md
• (If possible) Add tests

[github-actions]

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[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 38.65%. Comparing base (2f8d020) to head (5e4713a).
Report is 1 commits behind head on develop.

Files with missing lines	Patch %	Lines
...d/src/server/api/endpoints/following/invalidate.ts	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##           develop   #15430       +/-   ##
============================================
+ Coverage    18.81%   38.65%   +19.84%     
============================================
  Files          768     1607      +839     
  Lines       111510   204774    +93264     
  Branches      1236     4029     +2793     
============================================
+ Hits         20978    79163    +58185     
- Misses       89941   124969    +35028     
- Partials       591      642       +51     

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[mi-gh-maintainer]

Thank you 🙏