Bump mkdocs-material from 9.1.1 to 9.4.4

Bumps [mkdocs-material](https://github.com/squidfunk/mkdocs-material) from 9.1.1 to 9.4.4.
- [Release notes](https://github.com/squidfunk/mkdocs-material/releases)
- [Changelog](https://github.com/squidfunk/mkdocs-material/blob/master/CHANGELOG)
- [Commits](squidfunk/mkdocs-material@9.1.1...9.4.4)

---
updated-dependencies:
- dependency-name: mkdocs-material
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

requirements-docs.txt

@@ -1,4 +1,4 @@
-mkdocs-material==9.1.1
+mkdocs-material==9.4.4
 plotly==4.14.3
 mkdocstrings==0.20.0
 mkdocstrings-python==0.8.3