Removing invalid git option when updating submodules (#91132)
Same as this: https://github.com/pytorch/builder/pull/1246
Related to following git commit: https://github.com/git/git/commit/51243f9f0f6a932ea579fd6f8014b348f8c2a523
Which makes jobs = 0 invalid.
Nightlies for MacOS are failing because of this issue: https://github.com/pytorch/pytorch/actions/runs/3729522653/jobs/6325523414
Pull Request resolved: https://github.com/pytorch/pytorch/pull/91132
Approved by: https://github.com/kit1980, https://github.com/huydhn, https://github.com/malfet, https://github.com/seemethere
