Build(deps-dev): Bump mkdocstrings-python from 1.19.0 to 2.0.3

Bumps [mkdocstrings-python](https://github.com/mkdocstrings/python) from 1.19.0 to 2.0.3.
- [Release notes](https://github.com/mkdocstrings/python/releases)
- [Changelog](https://github.com/mkdocstrings/python/blob/main/CHANGELOG.md)
- [Commits](mkdocstrings/python@1.19.0...2.0.3)

---
updated-dependencies:
- dependency-name: mkdocstrings-python
  dependency-version: 2.0.3
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

pyproject.toml

@@ -65,7 +65,7 @@ dev-mkdocs = [
   "mkdocs-macros-plugin == 1.5.0",
   "mkdocs-material == 9.7.3",
   "mkdocstrings[python] == 1.0.3",
-  "mkdocstrings-python == 1.19.0",
+  "mkdocstrings-python == 2.0.3",
   "frequenz-repo-config[lib] == 0.16.0",
 ]
 dev-mypy = [