[quant] Fix docs build (#67169)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/67169
Looks like the doc error only appears after it's landed
Test Plan: Imported from OSS
Reviewed By: seemethere
Differential Revision: D31890431
fbshipit-source-id: d40cba082712c4b35704ea15d82fbc4749f85aec
