Bump readmeio/rdme from 8 to 9 in the actions-dependencies group

Bumps the actions-dependencies group with 1 update: [readmeio/rdme](https://github.com/readmeio/rdme).


Updates `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
  dependency-group: actions-dependencies
...

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/release.yml

@@ -203,7 +203,7 @@ jobs:
         run: cat files/frontmatter.txt artifacts/reference.md > readme_reference.md
 
       - name: Sync fp reference to ReadMe
-        uses: readmeio/rdme@v8
+        uses: readmeio/rdme@v9
         env:
           RDME_API_KEY: ${{ secrets.README_API_KEY }}
         with: