build(deps-dev): bump mdformat-mkdocs from 2.0.6 to 2.0.9

Bumps [mdformat-mkdocs](https://github.com/kyleking/mdformat-mkdocs) from 2.0.6 to 2.0.9.
- [Release notes](https://github.com/kyleking/mdformat-mkdocs/releases)
- [Commits](KyleKing/mdformat-mkdocs@v2.0.6...v2.0.9)

---
updated-dependencies:
- dependency-name: mdformat-mkdocs
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

Pipfile

@@ -13,7 +13,7 @@ flake8-bandit = "==4.1.1"
 mkdocs = "==1.5.3"
 mdformat = "==0.7.17"
 mdformat-frontmatter = "==2.0.8"
-mdformat-mkdocs = "==2.0.6"
+mdformat-mkdocs = "==2.0.9"
 mypy = "==1.9.0"
 pdoc3 = "==0.10.0"
 pre-commit = "==3.5.0"