Bump mkdocs-material[imaging] from 9.6.9 to 9.6.11 (#624)

Bumps [mkdocs-material[imaging]](https://github.com/squidfunk/mkdocs-material) from 9.6.9 to 9.6.11.
- [Release notes](https://github.com/squidfunk/mkdocs-material/releases)
- [Changelog](https://github.com/squidfunk/mkdocs-material/blob/master/CHANGELOG)
- [Commits](squidfunk/mkdocs-material@9.6.9...9.6.11)

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

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

Author: dependabot[bot]

requirements.txt

@@ -1,2 +1,2 @@
-mkdocs-material[imaging]==9.6.9
+mkdocs-material[imaging]==9.6.11
 mkdocs-macros-plugin==1.3.7