Easier english updated tech docs (#42016)
Summary:
Just added a easier way to understand the tech docs
Pull Request resolved: https://github.com/pytorch/pytorch/pull/42016
Reviewed By: colesbury
Differential Revision: D22735752
Pulled By: mrshenli
fbshipit-source-id: 8e3dfb721f51ee0869b0df66bf856d9949553453
