⬆ Bump mkdocs-material from 9.5.50 to 9.6.4

Bumps [mkdocs-material](https://github.com/squidfunk/mkdocs-material) from 9.5.50 to 9.6.4.
- [Release notes](https://github.com/squidfunk/mkdocs-material/releases)
- [Changelog](https://github.com/squidfunk/mkdocs-material/blob/master/CHANGELOG)
- [Commits](squidfunk/mkdocs-material@9.5.50...9.6.4)

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

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

requirements-docs.txt

@@ -1,6 +1,6 @@
 -e .
 
-mkdocs-material==9.5.50
+mkdocs-material==9.6.4
 mdx-include >=1.4.1,<2.0.0
 mkdocs-redirects>=1.2.1,<1.3.0
 pyyaml >=5.3.1,<7.0.0