Add doc copy-edits from review (#26322)
Summary:
Add edits from doc review
](https://our.intern.facebook.com/intern/diff/17859654/)
Pull Request resolved: https://github.com/pytorch/pytorch/pull/26322
Pulled By: driazati
Differential Revision: D17859654
fbshipit-source-id: f3a116cddb5393bdfbef670c56efb2ee62ccf252
