chore(deps): bump mkdocs-material from 8.5.11 to 9.5.33

Bumps [mkdocs-material](https://github.com/squidfunk/mkdocs-material) from 8.5.11 to 9.5.33.
- [Release notes](https://github.com/squidfunk/mkdocs-material/releases)
- [Changelog](https://github.com/squidfunk/mkdocs-material/blob/master/CHANGELOG)
- [Upgrade guide](https://github.com/squidfunk/mkdocs-material/blob/master/docs/upgrade.md)
- [Commits](squidfunk/mkdocs-material@8.5.11...9.5.33)

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

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

docs/requirements.txt

@@ -1,2 +1,2 @@
 mkdocs==1.4.2
-mkdocs-material==8.5.11
+mkdocs-material==9.5.33