README.md fix (#1316)
Summary:
The torchaudio is missing when create new env and install.
Error message:
checking packages torch, torchvision, torchtext, torchaudio are installed...FAIL
Error: Users must first manually install packages ['torch', 'torchvision', 'torchtext', 'torchaudio'] before installing the benchmark.
Pull Request resolved: https://github.com/pytorch/benchmark/pull/1316
Reviewed By: FindHao
Differential Revision: D41426191
Pulled By: xuzhao9
fbshipit-source-id: 3112de180d656a804dc4d8f39e8ae4975da26917
