Correct conv and pooling docstrings in nn module (#17052)
Summary:
This PR fix conv and pooling docstrings in nn module
Pull Request resolved: https://github.com/pytorch/pytorch/pull/17052
Differential Revision: D14068566
Pulled By: ezyang
fbshipit-source-id: 3ec1de232ff6334b6a544dadefbb0ee6193d443a
