chore(deps-dev): bump mkdocs-material from 9.1.6 to 9.1.8

Bumps [mkdocs-material](https://github.com/squidfunk/mkdocs-material) from 9.1.6 to 9.1.8.
- [Release notes](https://github.com/squidfunk/mkdocs-material/releases)
- [Changelog](https://github.com/squidfunk/mkdocs-material/blob/master/CHANGELOG)
- [Commits](squidfunk/mkdocs-material@9.1.6...9.1.8)

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

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

Author: dependabot[bot]

poetry.lock

@@ -82,7 +82,7 @@ mypy-boto3-s3 = "^1.26.116"
 mypy-boto3-xray = "^1.26.11"
 types-requests = "^2.28.11"
 typing-extensions = "^4.4.0"
-mkdocs-material = "^9.1.6"
+mkdocs-material = "^9.1.8"
 filelock = "^3.12.0"
 checksumdir = "^1.2.0"
 mypy-boto3-appconfigdata = "^1.26.70"