add changes

train_multi.sh

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+accelerate launch \
+  --multi_gpu \
+  --num_processes=4 \
+  --mixed_precision=fp16 \
+  $(which lerobot-train) \
+  --batch_size=32 \
+  --save_freq=5000 \
+  --num_workers=32 \
+  --dataset.repo_id=libero_dataset \
+  --dataset.root=/fsx/jade_choghari/datasets/libero/ \
+  --policy.type=xvla \
+  --output_dir=/fsx/jade_choghari/outputs/train/xvla_libero_multi \
+  --job_name=xvla_libero \
+  --policy.device=cuda \
+  --policy.action_mode=franka_joint7 \
+  --wandb.enable=true \
+  --policy.repo_id=jadechoghari/X-VLA-Libero \
+  --steps=10000