Bump mypy from 1.5.1 to 1.6.1

Bumps [mypy](https://github.com/python/mypy) from 1.5.1 to 1.6.1.
- [Changelog](https://github.com/python/mypy/blob/master/CHANGELOG.md)
- [Commits](python/mypy@v1.5.1...v1.6.1)

---
updated-dependencies:
- dependency-name: mypy
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

requirements-testing.txt

@@ -2,5 +2,5 @@ pytest==7.4.3
 pytest-cov==4.1.0
 pytest-pretty==1.2.0
 mypy==0.812;python_version<"3.9"
-mypy==1.5.1;python_version>"3.8"
+mypy==1.6.1;python_version>"3.8"
 ruff==0.1.3