Add 90k student to model card

README.md

@@ -20,6 +20,7 @@ instead of the teacher's 25.
 
 | Folder | Student | Train steps | Code |
 |---|---|---|---|
+| `video_ffm_90k/` | 90,000-step student | 90k | new dual-head v2 |
 | `video_ffm_50k/` | 50,000-step student | 50k | original video-head FFM |
 | `video_ffm_5k/`  | 5,000-step student  | 5k  | new dual-head v2 |