Adds torch.random to docs/toc (#23553)
Summary:
Fix for https://github.com/pytorch/pytorch.github.io/issues/162
Pull Request resolved: https://github.com/pytorch/pytorch/pull/23553
Differential Revision: D16700003
Pulled By: soumith
fbshipit-source-id: 0d988985fee9aeadd01f9caba24987f960ce2470
