chore: use a stale label instead of wontfix

Author: soyuka

.github/stale.yml

@@ -4,10 +4,13 @@ daysUntilStale: 60
 daysUntilClose: 7
 # Issues with these labels will never be considered stale
 exemptLabels:
+    - Hacktoberfest
     - bug
     - enhancement
+    - RFC
+    - ⭐ EU-FOSSA Hackathon
 # Label to use when marking an issue as stale
-staleLabel: wontfix
+staleLabel: stale
 # Comment to post when marking an issue as stale. Set to `false` to disable
 markComment: >
     This issue has been automatically marked as stale because it has not had