[quant][docs] Add example for the error message for fixed qparam ops (#84666)
Summary:
att, since example makes it clearer what the user needs to do
Test Plan:
local test for the error message
Reviewers:
Subscribers:
Tasks:
Tags:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/84666
Approved by: https://github.com/vkuzo, https://github.com/andrewor14
