Update README.md

README.md

@@ -49,7 +49,7 @@ Shards are named `shard-*.tar`. Inside each shard:
 shard-000000.tar
 ├── 0.image.jpg          # binocular RGB, H=384, W=768, C=3, uint8
 ├── 0.action.npy         # relative actions, shape (24, 20), float32
-├── 0.action_token.npy   # action tokens, shape (27,), int16 ∈ [0, 1024]
+├── 0.action_token.npy   # action tokens, shape (27,), int16 ∈ [0, 1024)
 ├── 0.meta.json          # metadata; includes "sub_task_instruction_key"
 ├── 1.image.jpg
 ├── 1.action.npy