Targeted documentation updates in autograd.functional (#72111)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/72111
For vectorize flag:
- Advertises the use of functorch
For autograd.functional.jvp:
- Advertises the use of functorch and the low-level jvp API, both of
which will be more performant than the double backprop trick.
Test Plan: - view docs
Reviewed By: albanD
Differential Revision: D33918065
Pulled By: zou3519
fbshipit-source-id: 6e19699aa94f0e023ccda0dc40551ad6d932b7c7
(cherry picked from commit b4662ceb99bf79d56727d9f1343669e584af50bd)
