build(deps): bump mkdocs-mermaid2-plugin in /hack/mkdocs/image (#4125)

Bumps [mkdocs-mermaid2-plugin](https://github.com/fralau/mkdocs-mermaid2-plugin) from 1.2.1 to 1.2.2.
- [Release notes](https://github.com/fralau/mkdocs-mermaid2-plugin/releases)
- [Changelog](https://github.com/fralau/mkdocs-mermaid2-plugin/blob/master/CHANGELOG.md)
- [Commits](fralau/mkdocs-mermaid2-plugin@v1.2.1...v1.2.2)

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

Author: k8s-infra-cherrypick-robot

hack/mkdocs/image/requirements.txt

@@ -12,7 +12,7 @@ mkdocs-awesome-pages-plugin==2.10.1
 mkdocs-macros-plugin==1.3.7
 mkdocs-material==9.6.18
 mkdocs-redirects==1.2.2
-mkdocs-mermaid2-plugin==1.2.1
+mkdocs-mermaid2-plugin==1.2.2
 pandas>=2.0.3
 pep562==1.1
 Pygments==2.19.2