Capitalized first letters in the contents of readme table (#77953)
Fixes #ISSUE_NUMBER
Changes have been made to the table in the readme docs
![Screenshot (98)](https://user-images.githubusercontent.com/96517901/169482656-e36f66aa-61fa-4e40-8f2d-5a833552a921.png)
Pull Request resolved: https://github.com/pytorch/pytorch/pull/77953
Approved by: https://github.com/svekars, https://github.com/kit1980