update mmap readme

README.md

@@ -5088,6 +5088,11 @@ This Table is from the `Accelerating Training with Neuron Interaction and Nowcas
 
 # Example
 
+**UPDATE: To train the NiNo model more efficiently we also uploaded the dataset in the mmap format (in the mmap branch), which is much faster to read for large arrays.
+See https://github.com/SamsungSAILMontreal/nino/blob/main/dataset/dataset.py#L123 for the dataset code 
+and https://github.com/SamsungSAILMontreal/nino/blob/main/README.md#training-nino for the training script examples.**
+
+
 Download and access trajectories of the fm-16 task (other three datasets: 'c10-16', 'lm1b-3-24', 'lm1b-2-32').
 The original trajectories was saved as float16, but when loading huggingface may convert it to float32 or float64 depending on the version.
 
@@ -5103,7 +5108,4 @@ print(np.array(dataset[str(i)][t]['data']).shape)  # (14378,)
 
 ```
 
-**To train the NiNo model we also uploaded the dataset in the mmap format (in the mmap branch), which is much faster for larger arrays.
-See https://github.com/SamsungSAILMontreal/nino/blob/main/dataset/dataset.py#L123 for the dataset code 
-and https://github.com/SamsungSAILMontreal/nino/blob/main/README.md#training-nino for the training script examples.**