[skip actions] Update stale.yml

added additional labels to exempt list.

Author: manujosephv

.github/stale.yml

@@ -6,6 +6,8 @@ daysUntilClose: 7
 exemptLabels:
   - pinned
   - security
+  - enhancement
+  - Open for Contribution
 # Label to use when marking an issue as stale
 staleLabel: wontfix
 # Comment to post when marking an issue as stale. Set to `false` to disable