Fix dtype arg typing for Tensor.type doc string (#67019)
Summary:
Fix typing error in PyCharm when using torch.Tensor.type(dtype=torch.int64)
<img width="386" alt="Screenshot 2021-10-21 at 15 30 50" src="https://user-images.githubusercontent.com/59562934/138288062-cc2ba45e-ece0-4fca-9369-55d020404c28.png">
Thanks for your great work! :)
cc brianjo mruberry
Pull Request resolved: https://github.com/pytorch/pytorch/pull/67019
Reviewed By: malfet
Differential Revision: D32311313
Pulled By: mruberry
fbshipit-source-id: 90fc453bc4129a301d567d4b39137b93c5dac01e
