Bump mkdocs-material from 8.4.0 to 8.4.1 (#1588)

Bumps [mkdocs-material](https://github.com/squidfunk/mkdocs-material) from 8.4.0 to 8.4.1.
- [Release notes](https://github.com/squidfunk/mkdocs-material/releases)
- [Changelog](https://github.com/squidfunk/mkdocs-material/blob/master/CHANGELOG)
- [Commits](https://github.com/squidfunk/mkdocs-material/compare/8.4.0...8.4.1)

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

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

@@ -1,5 +1,5 @@
 mkdocs==1.3.1
-mkdocs-material==8.4.0
+mkdocs-material==8.4.1
 pymdown-extensions==9.5
 mike==1.1.2
 mkdocs-simple-hooks==0.1.5