torch.futures doc formatting (#70630)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/70630
Params is incorrectly formatted [here](https://pytorch.org/docs/master/futures.html?highlight=future#:~:text=way%20as%20then().-,Parameters,-callback%20(Future)%20%E2%80%93%20a):
Updated docs:
https://docs-preview.pytorch.org/70630/futures.html?highlight=future#:~:text=way%20as%20then().-,Parameters,-callback%20(Future)%20%E2%80%93%20a
cc pietern mrshenli pritamdamania87 zhaojuanmao satgera rohan-varma gqchen aazzolini osalpekar jiayisuse SciPioneer H-Huang
Test Plan: Imported from OSS
Reviewed By: dagitses, mrshenli
Differential Revision: D33478214
Pulled By: H-Huang
fbshipit-source-id: 8cd7022ae79a8e6fe8b5fa8b767c55903c9ac368
