Update mypy requirement from ~=0.960 to ~=0.961 (Pycord-Development#1402

)

Updates the requirements on [mypy](https://github.com/python/mypy) to permit the latest version.
- [Release notes](https://github.com/python/mypy/releases)
- [Commits](python/mypy@v0.960...v0.961)

---
updated-dependencies:
- dependency-name: mypy
  dependency-type: direct:development
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

requirements-dev.txt

@@ -3,5 +3,5 @@ pylint~=2.13.9
 pytest~=7.1.2
 pytest-asyncio~=0.18.3
 # pytest-order~=1.0.1
-mypy~=0.960
+mypy~=0.961
 coverage~=6.4