Update stale.yml

Author: Garulf

.github/workflows/stale.yml

@@ -20,4 +20,5 @@ jobs:
           days-before-close: 7
           days-before-pr-close: -1
           exempt-all-milestones: true
+          close-issue-message: 'This issue was closed because it has been stale for 5 days with no activity. If you feel this issue still needs attention please feel free to reopen.'
           stale-pr-label: 'no-pr-activity'