update slot resume pointers for step 4877

slots/5/latest.json

@@ -1 +1 @@
-{"worker_id": "slot:5", "checkpoint": "slots/5/checkpoint-4493", "step": 4493, "updated_at": 1776734422}
+{"worker_id": "slot:5", "checkpoint": "slots/5/checkpoint-4877", "step": 4877, "updated_at": 1776735845}