fix typo in adaptive methods annotation (#20306)
Summary:
fixes #20215
The confusing behavior was caused by typos in type annotation :(
Pull Request resolved: https://github.com/pytorch/pytorch/pull/20306
Differential Revision: D15276216
Pulled By: ailzhang
fbshipit-source-id: 1b0c9635a72a05c9b537f80d85b117b5077fbec7
