pytorch

b4db5293 - Fix wrong link in docs/source/notes/ddp.rst (#40484)

Fix wrong link in docs/source/notes/ddp.rst (#40484) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/40484 Differential Revision: D22259834 Pulled By: mrshenli fbshipit-source-id: 4ec912c600c81010bdb2778c35cbb0321480199f