Add description about newer model in README.md (#2)

- Add description about newer model in README.md (991fc3f484aaad404966f65fb619de239434c901)


Co-authored-by: YichongEricZhao <[email protected]>

README.md

@@ -25,10 +25,11 @@ Firstly, combine the split model using the command `cat model.pt.part-* > model.
 │   ├── example_finetuning.py
 │   └── example_pretraining.py
 ├── experiments_data
-├── model.pt.part-aa # splited bin data of pre-trained model
-├── model.pt.part-ab
+├── model.pt.part-aa # splited bin data of *HISTORICAL* model (shorter context window, less VRAM comsuption)
+├── model.pt.part-ab 
 ├── model.pt.part-ac
 ├── model.pt.part-ad
+├── model_updated.pt # *NEWER* model, with longer context windows and being trained on a deduplicated dataset
 ├── model.py         # define the architecture
 ├── sampling.py      # script to generate sequences
 ├── tokenization.py  # preparete data