workflow: stales: stop closing stalled issues automatically

While it's a good idea to automatically stall and close PR when
inactive, we probably can live with inactive issues, since some of
them could be low hanging fruits, or long term (low priority) items.

Let's mark issue as stalled to indicate that it's been inactive, but
let's keep them open, we can do a manual triage from time to time.

Signed-off-by: Nicolas Dechesne <[email protected]>

Author: ndechesne

.github/workflows/stales.yml

@@ -19,6 +19,7 @@ jobs:
         exempt-pr-labels: bug,enhancement
         days-before-stale: 30
         days-before-close: 5
+        days-before-issue-close: -1
         remove-stale-when-updated: true
         remove-issue-stale-when-updated: true
         remove-pr-stale-when-updated: true