make sure windows tests get triggered (#30836)
Summary:
we prefer "_" over "-" in build names, so change checks in test script
Pull Request resolved: https://github.com/pytorch/pytorch/pull/30836
Differential Revision: D18840736
Pulled By: mingbowan
fbshipit-source-id: 6fdf736496225c5f8ab44906d8f4681b7bf894a7
