Update README.md

README.md

@@ -46,6 +46,12 @@ inverse cascade.
   - [The classical Kolmogorov inverse cascade with a solenoidal forcing and small drag.](https://github.com/scaomath/torch-cfd/blob/main/examples/Kolmogrov2d_rk4_cn_forced_turbulence.ipynb)
   - [The fast training using the data with a small number of vortices.](https://github.com/scaomath/torch-cfd/blob/main/examples/ex2_SFNO_train_fnodata.ipynb)
   - [The fast converging to the inverse cascade.](https://github.com/scaomath/torch-cfd/blob/main/examples/ex2_SFNO_5ep_spectra.ipynb)
+- **Note:** Due to the change of how `torch.load()` treat serialization, the data would not be loaded directly by calling `torch.load`. If you plan to use it, you can add the following code after the imports:
+     ```python
+     torch.serialization.add_safe_globals([defaultdict])
+     torch.serialization.add_safe_globals([list])
+     ``` 
+
 
 ## Dataset Structure