Update README (phase 1 complete)

README.md

@@ -15,8 +15,7 @@ root causes. Label text is in Chinese.
 - Task repository: embodied-first-exam commit `4c6d01b9990e3b78ddb620bbd237932b3696f60e`.
 - Phase 1: two runs per task (one success when there is one, plus a failure of another model; runs with a video first).
   Run records and videos: dataset `MLL-Lab/embodied-exam-media`, `runs/<runId>`.
-- Work in progress: tasks are added as soon as their DAG and all their trajectories pass validation, so the list below
-  grows during the run. Status: 331 tasks (3 pilot, 328 full run), 662 trajectories.
+- Phase 1 complete: every task of the run passed validation and is listed below. Status: 331 tasks (3 pilot, 328 full run), 662 trajectories.
 
 ## Layout