fix(backend): rbtのtypo修正

[kakkokari-gtyih]

What

bufferdReactions → bufferedReactions

Why

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[bot]]

api.jsonの差分作成中にエラーが発生しました。詳細はWorkflowのログを確認してください。

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 0% with 13 lines in your changes missing coverage. Please review.

Project coverage is 39.63%. Comparing base (e87cbd2) to head (d14c211). Report is 1 commits behind head on develop.

Files with missing lines	Patch %	Lines
...ges/backend/src/core/entities/NoteEntityService.ts	0.00%	13 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #14609 +/- ## =========================================== - Coverage 39.64% 39.63% -0.02% =========================================== Files 1539 1539 Lines 192286 192286 Branches 2529 2467 -62 =========================================== - Hits 76231 76203 -28 - Misses 115493 115521 +28 Partials 562 562 ```

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[syuilo]

🙏🏻