pytorch

39a23c79 - Add docs/README.md to make existing doc build info more discoverable (#49286)

Add docs/README.md to make existing doc build info more discoverable (#49286) Summary: Closes gh-42003 Pull Request resolved: https://github.com/pytorch/pytorch/pull/49286 Reviewed By: glaringlee Differential Revision: D25535250 Pulled By: ezyang fbshipit-source-id: a7790bfe4528fa6a31698126cc687793fdf7ac3f