Update README.md

Update README.md

Upload proteinnet_valid.json.gz with huggingface_hub

Upload proteinnet_train.json.gz with huggingface_hub

Delete proteinnet_train.json.gz

Upload proteinnet_test.json.gz with huggingface_hub

Upload proteinnet_train.json.gz with huggingface_hub

Upload proteinnet_train.json.gz with huggingface_hub

initial commit