Bump mkdocs-awesome-pages-plugin from 2.8.0 to 2.9.0 (#144)

Bumps [mkdocs-awesome-pages-plugin](https://github.com/lukasgeiter/mkdocs-awesome-pages-plugin) from 2.8.0 to 2.9.0.
- [Release notes](https://github.com/lukasgeiter/mkdocs-awesome-pages-plugin/releases)
- [Commits](https://github.com/lukasgeiter/mkdocs-awesome-pages-plugin/compare/v2.8.0...v2.9.0)

---
updated-dependencies:
- dependency-name: mkdocs-awesome-pages-plugin
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

requirements-docs.txt

@@ -5,4 +5,4 @@ mike==1.1.2
 mkdocs-simple-hooks==0.1.5
 mkdocs-git-revision-date-plugin==0.3.2
 mdx-truly-sane-lists==1.3
-mkdocs-awesome-pages-plugin==2.8.0
+mkdocs-awesome-pages-plugin==2.9.0