chore(deps): bump readmeio/rdme from 8 to 9 (#1234)

Bumps [readmeio/rdme](https://github.com/readmeio/rdme) from 8 to 9.
- [Release notes](https://github.com/readmeio/rdme/releases)
- [Changelog](https://github.com/readmeio/rdme/blob/next/CHANGELOG.md)
- [Commits](readmeio/rdme@v8...v9)

---
updated-dependencies:
- dependency-name: readmeio/rdme
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/CI_readme_sync.yml

@@ -81,6 +81,6 @@ jobs:
           ls tmp
 
       - name: Sync API docs with Haystack docs version ${{ matrix.hs-docs-version }}
-        uses: readmeio/rdme@v8
+        uses: readmeio/rdme@v9
         with:
           rdme: docs ${{ steps.pathfinder.outputs.project_path }}/tmp --key=${{ secrets.README_API_KEY }} --version=${{ matrix.hs-docs-version }}