Resolves #67227 documentation issue (#67379)
Summary:
Changed "Chi2" in the docstring to a more intuitive "Chi-squared"
Fixes https://github.com/pytorch/pytorch/issues/67227
Pull Request resolved: https://github.com/pytorch/pytorch/pull/67379
Reviewed By: jbschlosser
Differential Revision: D32023761
Pulled By: ngimel
fbshipit-source-id: b514b49726f616914871a9a831aa10e12e4be90b
