Update stale, to ignore backlog Issues & PRs (#8249)

.github/workflows/stale.yml

@@ -16,8 +16,8 @@ jobs:
           stale-issue-message: "Hi, @coronasafe/care-frontend-maintainers, This issue has been automatically marked as stale because it has not had any recent activity."
           stale-pr-message: "Hi, This pr has been automatically marked as stale because it has not had any recent activity. It will be automatically closed if no further activity occurs for 7 more days. Thank you for your contributions."
           close-pr-message: "Hi, @coronasafe/care-frontend-maintainers, This PR has been automatically closed due to inactivity. Thank you for your contributions. Feel free to re-open the PR."
-          exempt-issue-labels: "blocked,waiting for related PR,waiting for back end,help wanted,work-in-progress,In Progress,wishlist,EPIC"
-          exempt-pr-labels: "tested,needs testing,need Review,waiting for related PR,waiting for back end,help wanted,blocked,work-in-progress,In Progress"
+          exempt-issue-labels: "blocked,waiting for related PR,waiting for back end,help wanted,work-in-progress,In Progress,wishlist,EPIC,backlog"
+          exempt-pr-labels: "tested,needs testing,need Review,waiting for related PR,waiting for back end,help wanted,blocked,work-in-progress,In Progress,backlog"
           days-before-issue-stale: 14
           days-before-pr-stale: 7
           days-before-issue-close: -1