Bump pydocstyle from 5.1.1 to 6.1.1

Bumps [pydocstyle](https://github.com/PyCQA/pydocstyle) from 5.1.1 to 6.1.1.
- [Release notes](https://github.com/PyCQA/pydocstyle/releases)
- [Changelog](https://github.com/PyCQA/pydocstyle/blob/master/docs/release_notes.rst)
- [Commits](PyCQA/pydocstyle@5.1.1...6.1.1)

---
updated-dependencies:
- dependency-name: pydocstyle
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

requirements-testing.txt

@@ -5,7 +5,7 @@ pytest-cov==2.12.1
 pytest-mock==3.5.1
 pytest-xdist==2.2.1
 moto==2.0.7
-pydocstyle==5.1.1
+pydocstyle==6.1.1
 flake8==4.0.1
 mypy==0.812
 mypy-extensions==0.4.3