using PR number instead of IN_PULL_REQUEST (#63360)
Summary:
PR numbers should be available on GHA after this.
This fixes some target determinator not working issue discovered when manually running: https://github.com/pytorch/pytorch/issues/63412.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/63360
Reviewed By: malfet, zhouzhuojie, seemethere
Differential Revision: D30374615
Pulled By: walterddr
fbshipit-source-id: eee8d8bb7aa4308a6a50cfdcd4423a96d846777f
Author
Rong Rong (AI Infra)
