Bump mkdocs from 1.2.1 to 1.2.2

Bumps [mkdocs](https://github.com/mkdocs/mkdocs) from 1.2.1 to 1.2.2.
- [Release notes](https://github.com/mkdocs/mkdocs/releases)
- [Commits](mkdocs/mkdocs@1.2.1...1.2.2)

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

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

Author: dependabot[bot]

requirements.txt

@@ -1,5 +1,5 @@
 # docs requirements:
-mkdocs==1.2.1
+mkdocs==1.2.2
 mkdocs-minify-plugin==0.4.1
 mkdocs-redirects==1.0.3
 mkdocs-plugin-progress==1.2.0