fix optimizer.pyi typo 'statue'->'state' (#49388)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/49388
Test Plan: Imported from OSS
Reviewed By: zou3519
Differential Revision: D25553672
Pulled By: glaringlee
fbshipit-source-id: e9f2233bd678a90768844af2d8d5e2994d59e304
