build(deps): bump jontze/action-mdbook from 2.2.1 to 2.2.2 (#7632)

Bumps [jontze/action-mdbook](https://github.com/jontze/action-mdbook) from 2.2.1 to 2.2.2.
- [Release notes](https://github.com/jontze/action-mdbook/releases)
- [Changelog](https://github.com/jontze/action-mdbook/blob/master/CHANGELOG.md)
- [Commits](jontze/action-mdbook@v2.2.1...v2.2.2)

---
updated-dependencies:
- dependency-name: jontze/action-mdbook
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

.github/workflows/docs.yml

@@ -79,7 +79,7 @@ jobs:
       - uses: r7kamura/[email protected]
 
       - name: Setup mdBook
-        uses: jontze/[email protected].1
+        uses: jontze/[email protected].2
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
           mdbook-version: '~0.4'