Correct stair object count

README.md

@@ -100,7 +100,7 @@ The 3-digit `NNN` index restarts at 0 within each `<object>`.
 | `sitting` | Sitting — sit down on chair-like objects | Hunyuan3D-generated 3D assets | 189 | 1,748 | 5 s | 218,500 |
 | `slope` | Terrain slope locomotion — walk over inclined surfaces | Procedural terrain assets | 200 | 1,880 | 10 s | 470,000 |
 | `curb` | Terrain curb locomotion — step over curb assets | Procedural terrain assets | 200 | 1,769 | 10 s | 442,250 |
-| `stair` (`stair_p1` + `stair_p2`) | Stair locomotion — ascend and descend stair assets | Generated synthetic and real stair assets | 5,626 | 12,188 | 10 s | 3,047,000 |
+| `stair` (`stair_p1` + `stair_p2`) | Stair locomotion — ascend and descend stair assets | Generated synthetic and real stair assets | 4,952 | 12,188 | 10 s | 3,047,000 |
 
 Additional categories (tabletop / ground manipulation) are planned for subsequent releases.