Add doc copy-edits from review (#26322)
Summary:
Add edits from doc review
](https://our.intern.facebook.com/intern/diff/17750005/)
Pull Request resolved: https://github.com/pytorch/pytorch/pull/26322
Pulled By: driazati
Differential Revision: D17750005
fbshipit-source-id: 230d1d33efb015e40327373a05a1d3eced7c5c00
