Bump mypy from 1.4.1 to 1.6.0 in /python

Bumps [mypy](https://github.com/python/mypy) from 1.4.1 to 1.6.0.
- [Commits](python/mypy@v1.4.1...v1.6.0)

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

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

python/requirements.txt

@@ -3,4 +3,4 @@ pytest == 7.4.2; python_version >= '3.7'
 pytest-parametrization == 2022.2.1
 mypy == 0.971; python_version < '3.7'
 mypy == 1.4.1; python_version == '3.7.*'
-mypy == 1.5.1; python_version >= '3.8'
+mypy == 1.6.0; python_version >= '3.8'