fix docstring default value of `last_epoch` for SWALR in torch/optim/… (#62799)
Summary:
…swa_utils
Fixes https://github.com/pytorch/pytorch/issues/62633
Pull Request resolved: https://github.com/pytorch/pytorch/pull/62799
Reviewed By: zou3519
Differential Revision: D30131929
Pulled By: H-Huang
fbshipit-source-id: 741c077073bbe398492dff0761836acdbba7be78
