Bump mkdocstrings[python] in the mkdocstrings group

Bumps the mkdocstrings group with 1 update: [mkdocstrings[python]](https://github.com/mkdocstrings/mkdocstrings).


Updates `mkdocstrings[python]` from 0.28.3 to 0.29.1
- [Release notes](https://github.com/mkdocstrings/mkdocstrings/releases)
- [Changelog](https://github.com/mkdocstrings/mkdocstrings/blob/main/CHANGELOG.md)
- [Commits](mkdocstrings/mkdocstrings@0.28.3...0.29.1)

---
updated-dependencies:
- dependency-name: mkdocstrings[python]
  dependency-version: 0.29.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: mkdocstrings
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

pyproject.toml

@@ -62,7 +62,7 @@ dev-mkdocs = [
   "mkdocs-gen-files == 0.5.0",
   "mkdocs-literate-nav == 0.6.1",
   "mkdocs-material == 9.6.1",
-  "mkdocstrings[python] == 0.28.3",
+  "mkdocstrings[python] == 0.29.1",
   "frequenz-repo-config[api] == 0.12.3",
 ]
 dev-mypy = [