Run optim benchmarks on new runner (#2556)
Summary:
Workflow has been failing due to runner migration, this should be the right one now.
Pull Request resolved: https://github.com/pytorch/benchmark/pull/2556
Reviewed By: kit1980
Differential Revision: D67161443
Pulled By: janeyx99
fbshipit-source-id: 6b46cf8b162f5081668d69bd4943729f9d165589
