Bump mkdocs-material from 9.1.8 to 9.1.11

Bumps [mkdocs-material](https://github.com/squidfunk/mkdocs-material) from 9.1.8 to 9.1.11.
- [Release notes](https://github.com/squidfunk/mkdocs-material/releases)
- [Changelog](https://github.com/squidfunk/mkdocs-material/blob/master/CHANGELOG)
- [Commits](squidfunk/mkdocs-material@9.1.8...9.1.11)

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

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

requirements-test.txt

@@ -4,7 +4,7 @@ isort==5.12.0
 bandit==1.7.5
 mike==1.1.2
 markdown-include==0.8.1
-mkdocs-material==9.1.8
+mkdocs-material==9.1.11
 mkdocs-minify-plugin==0.6.4
 mkdocstrings==0.21.2
 ./util/mkdocs-redirects