chore: bump mkdocs-material from 7.1.5 to 7.1.6 (#451)

Bumps [mkdocs-material](https://github.com/squidfunk/mkdocs-material) from 7.1.5 to 7.1.6.
- [Release notes](https://github.com/squidfunk/mkdocs-material/releases)
- [Changelog](https://github.com/squidfunk/mkdocs-material/blob/master/docs/changelog.md)
- [Commits](squidfunk/mkdocs-material@7.1.5...7.1.6)

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

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

Author: dependabot[bot]

poetry.lock

@@ -49,7 +49,7 @@ radon = "^4.5.0"
 xenon = "^0.7.1"
 flake8-eradicate = "^1.0.0"
 flake8-bugbear = "^21.3.2"
-mkdocs-material = "^7.1.0"
+mkdocs-material = "^7.1.6"
 mkdocs-git-revision-date-plugin = "^0.3.1"
 mike = "^0.6.0"