Fix MaxPool default pad documentation (#59404)
Summary:
Fixes https://github.com/pytorch/pytorch/issues/33384
Pull Request resolved: https://github.com/pytorch/pytorch/pull/59404
Reviewed By: albanD
Differential Revision: D28879049
Pulled By: Varal7
fbshipit-source-id: 03a86cd347d53ac2d06028b3f213c5b5d5ab7e91