Bump actions/stale from 6.0.1 to 9.0.0 (grafana#3214)

Bumps [actions/stale](https://github.com/actions/stale) from 6.0.1 to 9.0.0.
- [Release notes](https://github.com/actions/stale/releases)
- [Changelog](https://github.com/actions/stale/blob/main/CHANGELOG.md)
- [Commits](actions/stale@v6.0.1...v9.0.0)

---
updated-dependencies:
- dependency-name: actions/stale
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/stale.yml

@@ -12,7 +12,7 @@ jobs:
     if: github.repository == 'grafana/tempo'
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/stale@v6.0.1
+      - uses: actions/stale@v9.0.0
         with:
           close-issue-reason: not_planned
           operations-per-run: 100