fix typo in argmax docstring (#55239)
Summary:
argmax docstring previously said that it returns indexes of the first 'minimal' value, fixed typo in that line to 'maximal'
Pull Request resolved: https://github.com/pytorch/pytorch/pull/55239
Reviewed By: albanD
Differential Revision: D27641562
Pulled By: mrshenli
fbshipit-source-id: f8b5c579400088b5210c83a05da6c4c106fbf95d
