chore(deps): Bump actions/stale from v3.0.14 to v3.0.15

Bumps [actions/stale](https://github.com/actions/stale) from v3.0.14 to v3.0.15.
- [Release notes](https://github.com/actions/stale/releases)
- [Commits](actions/stale@v3.0.14...8656146)

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/prune.yaml

@@ -18,7 +18,7 @@ jobs:
 
     steps:
       - name: "Prune issues and pull requests"
-        uses: "actions/stale@v3.0.14"
+        uses: "actions/stale@v3.0.15"
         with:
           days-before-close: "${{ env.DAYS_BEFORE_CLOSE }}"
           days-before-stale: "${{ env.DAYS_BEFORE_STALE }}"