adding exception for major releases

Author: mihaileu

.github/workflows/stale.yml

@@ -18,5 +18,5 @@ jobs:
         stale-issue-label: 'no-issue-activity'
         stale-pr-label: 'no-pr-activity'
         exempt-issue-labels: 'awaiting-approval,work-in-progress,pinned,security'
-        exempt-pr-labels: 'awaiting-approval,work-in-progress'
+        exempt-pr-labels: 'awaiting-approval,work-in-progress,requires-major-increase'
         ascending: true