Fix a few bugs in v1 nightly workflow. (#505)
Summary:
The v1 nightly workflow breaks after auto-bisection landed. This PR fixes it.
Pull Request resolved: https://github.com/pytorch/benchmark/pull/505
Test Plan: V1 Nightly CI
Reviewed By: mrshenli
Differential Revision: D31848483
Pulled By: xuzhao9
fbshipit-source-id: f9e8b51d36df87d797ecbd6a583025f5abe88056
