update slot resume pointers for step 2187

slots/1/latest.json

@@ -1 +1 @@
-{"worker_id": "slot:1", "checkpoint": "slots/1/checkpoint-705", "step": 705, "updated_at": 1776397002}
+{"worker_id": "slot:1", "checkpoint": "slots/1/checkpoint-2187", "step": 2187, "updated_at": 1776405714}