Bump actions/stale from 4.1.1 to 8.0.0 (#419) (#420)

Bumps [actions/stale](https://github.com/actions/stale) from 4.1.1 to 8.0.0.
- [Release notes](https://github.com/actions/stale/releases)
- [Changelog](https://github.com/actions/stale/blob/main/CHANGELOG.md)
- [Commits](actions/stale@v4.1.1...v8.0.0)

---
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>

Author: github-actions[bot]

.github/workflows/stale_issues.yml

@@ -11,7 +11,7 @@ jobs:
   stale:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/stale@v4.1.1
+      - uses: actions/stale@v8.0.0
         with:
           exempt-issue-labels: "pinned"
           stale-issue-message: "@ricardozanini @hbelmiro This is being labeled as Stale."