docs: add `reset_peak_memory_stats` in cuda.rst (#54668)
Summary:
fixes https://github.com/pytorch/pytorch/issues/41808
https://11812999-65600975-gh.circle-artifacts.com/0/docs/cuda.html
One question: does `reset_peak_stats` exist in `torch.cuda` ?
I can't find anywhere.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/54668
Reviewed By: ailzhang
Differential Revision: D27328444
Pulled By: zou3519
fbshipit-source-id: 098024d43da98e3249aa9aa71cb10126095504a4
