Update op replacement tutorial (#50377)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/50377
Test Plan: Imported from OSS
Reviewed By: jamesr66a
Differential Revision: D25870409
Pulled By: ansley
fbshipit-source-id: b873b89c2e62b57cd5d816f81361c8ff31be2948
