chore(deps): Bump actions/stale from 4 to 5 (#6)

Bumps [actions/stale](https://github.com/actions/stale) from 4 to 5.
- [Release notes](https://github.com/actions/stale/releases)
- [Changelog](https://github.com/actions/stale/blob/main/CHANGELOG.md)
- [Commits](actions/stale@v4...v5)

---
updated-dependencies:
- dependency-name: actions/stale
  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>

Author: dependabot[bot]

.github/workflows/prune.yaml

@@ -18,7 +18,7 @@ jobs:
 
     steps:
       - name: "Prune issues and pull requests"
-        uses: "actions/stale@v4"
+        uses: "actions/stale@v5"
         with:
           days-before-close: "${{ env.DAYS_BEFORE_CLOSE }}"
           days-before-stale: "${{ env.DAYS_BEFORE_STALE }}"