`print` fix in `lr_scheduler` (#68338)
Summary:
`{:5d}` fails for `CosineAnnealingWarmRestarts` which has float `epoch`
Pull Request resolved: https://github.com/pytorch/pytorch/pull/68338
Reviewed By: jbschlosser
Differential Revision: D33063970
Pulled By: albanD
fbshipit-source-id: 992e987f8d5f6f8f5067924df4671e9725b6d884
