Bump the optional group with 2 updates

Bumps the optional group with 2 updates: [pydoclint](https://github.com/jsh9/pydoclint) and [mkdocs-material](https://github.com/squidfunk/mkdocs-material).


Updates `pydoclint` from 0.3.8 to 0.3.9
- [Release notes](https://github.com/jsh9/pydoclint/releases)
- [Changelog](https://github.com/jsh9/pydoclint/blob/main/CHANGELOG.md)
- [Commits](jsh9/pydoclint@0.3.8...0.3.9)

Updates `mkdocs-material` from 9.5.3 to 9.5.4
- [Release notes](https://github.com/squidfunk/mkdocs-material/releases)
- [Changelog](https://github.com/squidfunk/mkdocs-material/blob/master/CHANGELOG)
- [Commits](squidfunk/mkdocs-material@9.5.3...9.5.4)

---
updated-dependencies:
- dependency-name: pydoclint
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: optional
- dependency-name: mkdocs-material
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: optional
...

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

Author: dependabot[bot]

pyproject.toml

@@ -41,15 +41,15 @@ dev-flake8 = [
   "flake8 == 6.1.0",
   "flake8-docstrings == 1.7.0",
   "flake8-pyproject == 1.2.3",  # For reading the flake8 config from pyproject.toml
-  "pydoclint == 0.3.8",
+  "pydoclint == 0.3.9",
   "pydocstyle == 6.3.0",
 ]
 dev-formatting = ["black == 23.12.1", "isort == 5.13.2"]
 dev-mkdocs = [
   "mike == 1.1.2",
   "mkdocs-gen-files == 0.5.0",
   "mkdocs-literate-nav == 0.6.1",
-  "mkdocs-material == 9.5.3",
+  "mkdocs-material == 9.5.4",
   "mkdocstrings[python] == 0.24.0",
   "frequenz-repo-config[api] == 0.8.0",
 ]