Fix simple typo: whos -> whose (#31288)
Summary:
Closes https://github.com/pytorch/pytorch/issues/31287
Pull Request resolved: https://github.com/pytorch/pytorch/pull/31288
Differential Revision: D19166753
Pulled By: zou3519
fbshipit-source-id: da31ad323b8fafa7cbc502fda4e2eb6e02facfb6
