s/staleComment/markComment

Fix stalebot config.

Author: tmpsantos

.github/stale.yml

@@ -10,15 +10,15 @@ limitPerRun: 1
 pulls:
   daysUntilStale: 60
   daysUntilClose: -1
-  staleComment: false
+  markComment: false
   closeComment: >
     This pull request has been automatically detected as stale because it has not had
     recent activity and will be archived. Thank you for your contributions.
 
 issues:
   daysUntilStale: 180
   daysUntilClose: -1
-  staleComment: false
+  markComment: false
   closeComment: >
     This issue has been automatically detected as stale because it has not had
     recent activity and will be archived. Thank you for your contributions.