Bump mkdocstrings-python from 1.3.0 to 1.6.0

Bumps [mkdocstrings-python](https://github.com/mkdocstrings/python) from 1.3.0 to 1.6.0.
- [Release notes](https://github.com/mkdocstrings/python/releases)
- [Changelog](https://github.com/mkdocstrings/python/blob/main/CHANGELOG.md)
- [Commits](mkdocstrings/python@1.3.0...1.6.0)

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

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

Author: dependabot[bot]

docs/requirements.txt

@@ -1,3 +1,3 @@
 mkdocs==1.5.1
 mkdocstrings==0.22.0
-mkdocstrings-python==1.3.0
+mkdocstrings-python==1.6.0