native amp leak fix landed in 1.7.1 (#9115)
native amp leak fix landed in 1.7.1 (#9115)

update README with good news that the leak fix has been applied to pytorch-1.7.1.
huggingface/transformers,huggingface/pytorch-transformers,huggingface/transformers,huggingface/transformers,huggingface/transformers