fix(backend): mostr.pub, Mitraのユーザーをフォローできない問題を修正

[typeling1578]

What

Fixes #11122

Why

Additional info (optional)

v12の時点では${this.config.url}/follows/${follower.id}/${followee.id}だったようです。
また、Mitraを使用しているサーバーのユーザーも #11122 と同様の問題が発生します。

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

[codecov]

Codecov Report

Patch coverage: 28.00% and no project coverage change.

Comparison is base (c836157) 78.90% compared to head (468ed0e) 78.90%.
Report is 1 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop   #11791   +/-   ##
========================================
  Coverage    78.90%   78.90%           
========================================
  Files          930      930           
  Lines        98292    98341   +49     
  Branches      7817     7822    +5     
========================================
+ Hits         77555    77596   +41     
- Misses       20737    20745    +8     

Files Changed	Coverage Δ
.../backend/src/core/activitypub/ApResolverService.ts	56.19% <28.00%> (-1.71%)	⬇️

... and 4 files with indirect coverage changes

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[syuilo]

${this.config.url}/follows/${followRequest.id}じゃないと問題が発生するから変えたはず

[typeling1578]

ApResolverServiceを${this.config.url}/follows/${followRequest.id}の形式を処理できるように変更しました

[syuilo]

おろ、なんかテストが失敗してますね

[syuilo]

🙏🏻