Bump mkdocs-material from 8.0.2 to 8.1.4 (#2006)

Bumps [mkdocs-material](https://github.com/squidfunk/mkdocs-material) from 8.0.2 to 8.1.4.
- [Release notes](https://github.com/squidfunk/mkdocs-material/releases)
- [Changelog](https://github.com/squidfunk/mkdocs-material/blob/master/CHANGELOG)
- [Commits](squidfunk/mkdocs-material@8.0.2...8.1.4)

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

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Tom Christie <tom@tomchristie.com>

requirements.txt

@@ -9,7 +9,7 @@ charset-normalizer==2.0.6
 # Documentation
 mkdocs==1.2.3
 mkautodoc==0.1.0
-mkdocs-material==8.0.2
+mkdocs-material==8.1.4
 
 # Packaging
 twine==3.7.1