[doc] Add LSTM non-deterministic workaround (#40893)
Summary:
Related: https://github.com/pytorch/pytorch/issues/35661
Preview
Pull Request resolved: https://github.com/pytorch/pytorch/pull/40893
Reviewed By: vincentqb
Differential Revision: D22535418
Pulled By: ngimel
fbshipit-source-id: f194ddaff8ec6d03a3616c87466e2cbbe7e429a9
