Makes the use of the term "module" consistent through the serialization note (#41563)
Summary:
module -> torch.nn.Module or ScriptModule, as appropriate. + bonus grammar fix.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/41563
Reviewed By: gchanan
Differential Revision: D22584173
Pulled By: mruberry
fbshipit-source-id: 8c90f1f9a194bfdb277c97cf02c9b8c1c6ddc601
