[Docs] Minor fix to apply_ac doc (#85448)
Per title
Created from CodeHub with https://fburl.com/edit-in-codehub
Differential Revision: [D39714530](https://our.internmc.facebook.com/intern/diff/D39714530/)
Pull Request resolved: https://github.com/pytorch/pytorch/pull/85448
Approved by: https://github.com/awgu
