pytorch

a43e7a51 - Adds return type annotation for fork_rng function (#63724)

Adds return type annotation for fork_rng function (#63724) Summary: Fixes https://github.com/pytorch/pytorch/issues/63723 Since it's a generator function the type annotation shall be `Generator`.  Pull Request resolved: https://github.com/pytorch/pytorch/pull/63724 Reviewed By: iramazanli Differential Revision: D30543098 Pulled By: heitorschueroff fbshipit-source-id: ebdd34749defe1e26c899146786a0357ab4b4b9b