Add torchtext to fix benchmark installation error (#1424)
Summary:
TorchText is missing in the command,
`conda install pytorch torchvision torchaudio pytorch-cuda=11.7 -c pytorch-nightly -c nvidia` resulting in the following installation error:
```
python install.py
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/1424
Reviewed By: weiwangmeta
Differential Revision: D43488935
Pulled By: xuzhao9
fbshipit-source-id: 92dc638b53b492105512ee9793834395613fa173
