ltx2 config fix

Author: prishajain1

src/maxdiffusion/configs/ltx2_video.yml

@@ -80,7 +80,7 @@ dataset_name: ''
 train_split: 'train'
 dataset_type: 'tfrecord'
 cache_latents_text_encoder_outputs: True
-per_device_batch_size: 1
+per_device_batch_size: 1.0
 compile_topology_num_slices: -1 
 quantization_local_shard_count: -1
 use_qwix_quantization: False