Add note on forwarding arguments in the dispatcher (#53641)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/53641
ghstack-source-id: 123466764
Test Plan: comments only
Reviewed By: bhosmer
Differential Revision: D26922477
fbshipit-source-id: ad630b5e1b10a2238f9b48aba656b2ffe65520a1
