[JIT] fix documentation typo (#46926)
Summary:
Fixes https://github.com/pytorch/pytorch/issues/46816
Pull Request resolved: https://github.com/pytorch/pytorch/pull/46926
Reviewed By: glaringlee
Differential Revision: D24762897
Pulled By: eellison
fbshipit-source-id: f58c4db5f4dd037141c18ec1121816eba33f87b7
