Fix Pytorch docker image name by adding the registry prefix (#52089)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/52089
Test Plan:
Manually trigger the CI
Fixes the [nightly docker pipeline failure](https://github.com/pytorch/pytorch/actions?query=workflow%3A%22Build+PyTorch+nightly+Docker+image+and+push+to+GitHub+Container+Registry%22)
Reviewed By: albanD
Differential Revision: D26390660
Pulled By: xuzhao9
fbshipit-source-id: 5259fe35ffd154fc6684753f358ec5a63f31428f
