update slot resume pointers for step 3339

slots/6/latest.json

@@ -1 +1 @@
-{"worker_id": "slot:6", "checkpoint": "slots/6/checkpoint-3095", "step": 3095, "updated_at": 1776688545}
+{"worker_id": "slot:6", "checkpoint": "slots/6/checkpoint-3339", "step": 3339, "updated_at": 1776689493}