update slot resume pointers for step 7951

slots/4/latest.json

@@ -1 +1 @@
-{"worker_id": "slot:4", "checkpoint": "slots/4/checkpoint-6195", "step": 6195, "updated_at": 1776741694}
+{"worker_id": "slot:4", "checkpoint": "slots/4/checkpoint-7951", "step": 7951, "updated_at": 1776774788}