Update torch.randint documentation to include missing note (#48787)
Summary:
Fixes https://github.com/pytorch/pytorch/issues/46497
Includes note about returning dtype torch.int64.
Current documentation: https://pytorch.org/docs/stable/generated/torch.randint.html?highlight=randint#torch.randint
New documentation:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/48787
Test Plan: Built documentation and checked generated docs
Reviewed By: ailzhang
Differential Revision: D25339421
Pulled By: H-Huang
fbshipit-source-id: c2ecaacaeb57971fe7fba0d9d54f3c61b0fd04ce
