Bump mkdocs-material[imaging] from 9.5.21 to 9.5.22 in /docs

Bumps [mkdocs-material[imaging]](https://github.com/squidfunk/mkdocs-material) from 9.5.21 to 9.5.22.
- [Release notes](https://github.com/squidfunk/mkdocs-material/releases)
- [Changelog](https://github.com/squidfunk/mkdocs-material/blob/master/CHANGELOG)
- [Commits](squidfunk/mkdocs-material@9.5.21...9.5.22)

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

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

docs/requirements.txt

@@ -1,5 +1,5 @@
 mkdocs-material==9.5.22
-mkdocs-material[imaging]==9.5.21
+mkdocs-material[imaging]==9.5.22
 mkdocs-minify-plugin==0.8.0
 mkdocs-git-revision-date-localized-plugin==1.2.5
 mkdocs-git-committers-plugin-2==2.3.0