[Dependencies]: Bump bbeesley/gha-auto-dependabot-rebase

Bumps [bbeesley/gha-auto-dependabot-rebase](https://github.com/bbeesley/gha-auto-dependabot-rebase) from 1.5.0 to 1.5.6.
- [Release notes](https://github.com/bbeesley/gha-auto-dependabot-rebase/releases)
- [Changelog](https://github.com/bbeesley/gha-auto-dependabot-rebase/blob/main/CHANGELOG.md)
- [Commits](bbeesley/gha-auto-dependabot-rebase@v1.5.0...v1.5.6)

---
updated-dependencies:
- dependency-name: bbeesley/gha-auto-dependabot-rebase
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

.github/workflows/dependabot.yml

@@ -23,6 +23,6 @@ jobs:
         run: sudo chown -R "$USER:$USER" "$GITHUB_WORKSPACE"
 
       - name: "Rebase"
-        uses: bbeesley/[email protected].0
+        uses: bbeesley/[email protected].6
         env:
           GITHUB_TOKEN: ${{secrets.SOURCE_PUSH_TOKEN}}