Update index.rst (#47282)
Summary:
Updating master to match changes we made to 1.7.
Fixes #{issue number}
Pull Request resolved: https://github.com/pytorch/pytorch/pull/47282
Reviewed By: zhangguanheng66
Differential Revision: D24727322
Pulled By: brianjo
fbshipit-source-id: 64e3f06eb32c965390f282b81084460903d872a2
