build(deps): bump mkdocs-material from 9.1.17 to 9.1.18

Bumps [mkdocs-material](https://github.com/squidfunk/mkdocs-material) from 9.1.17 to 9.1.18.
- [Release notes](https://github.com/squidfunk/mkdocs-material/releases)
- [Changelog](https://github.com/squidfunk/mkdocs-material/blob/master/CHANGELOG)
- [Commits](squidfunk/mkdocs-material@9.1.17...9.1.18)

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

Signed-off-by: dependabot[bot] <support@github.com>

requirements.txt

@@ -10,7 +10,7 @@ MarkupSafe==2.1.3
 mkdocs==1.4.3
 mkdocs-awesome-pages-plugin==2.9.1
 mkdocs-macros-plugin==1.0.1
-mkdocs-material==9.1.17
+mkdocs-material==9.1.18
 mkdocs-material-extensions==1.1.1
 mkdocs-redirects==1.2.0
 mkdocs-mermaid2-plugin==0.6.0