Update stale.yml

Add closing message

Author: minbi

.github/stale.yml

@@ -13,4 +13,6 @@ markComment: >
   recent activity. It will be closed if no further activity occurs. Thank you
   for your contributions.
 # Comment to post when closing a stale issue. Set to `false` to disable
-closeComment: true
+closeComment: >
+  This issue has been automatically closed because of inactivity.
+  Please open a new issue if are still encountering problems.