Bump mkdocs from 1.4.1 to 1.4.2 (#357)

Bumps [mkdocs](https://github.com/mkdocs/mkdocs) from 1.4.1 to 1.4.2.
- [Release notes](https://github.com/mkdocs/mkdocs/releases)
- [Commits](mkdocs/mkdocs@1.4.1...1.4.2)

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

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

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

Author: dependabot[bot]

doc-requirements.txt

@@ -1 +1 @@
-mkdocs==1.4.1
+mkdocs==1.4.2