Bump mkdocs from 1.4.0 to 1.4.1 (#546)

Bumps [mkdocs](https://github.com/mkdocs/mkdocs) from 1.4.0 to 1.4.1.
- [Release notes](https://github.com/mkdocs/mkdocs/releases)
- [Commits](mkdocs/mkdocs@1.4.0...1.4.1)

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

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

requirements.txt

@@ -1,2 +1,2 @@
-mkdocs==1.4.0
+mkdocs==1.4.1
 mkdocs-material==8.5.6