Bump mkdocs-material from 9.6.8 to 9.6.9

Bumps [mkdocs-material](https://github.com/squidfunk/mkdocs-material) from 9.6.8 to 9.6.9.
- [Release notes](https://github.com/squidfunk/mkdocs-material/releases)
- [Changelog](https://github.com/squidfunk/mkdocs-material/blob/master/CHANGELOG)
- [Commits](squidfunk/mkdocs-material@9.6.8...9.6.9)

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

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

Author: dependabot[bot]

doc-requirements.txt

@@ -1,5 +1,5 @@
 mkdocs==1.6.1
-mkdocs-material==9.6.8
+mkdocs-material==9.6.9
 mkdocs-material-extensions~=1.3
 pygments==2.19.1
 pymdown-extensions==10.14.3