update slot resume pointers for step 485

slots/18/latest.json

@@ -1 +1 @@
-{"worker_id": "slot:18", "checkpoint": "slots/18/checkpoint-380", "step": 380, "updated_at": 1776359624}
+{"worker_id": "slot:18", "checkpoint": "slots/18/checkpoint-485", "step": 485, "updated_at": 1776388143}