Automated submodule update: FBGEMM (pytorch#73814)

Summary:
This is an automated pull request to update the first-party submodule for [pytorch/FBGEMM](https://github.com/pytorch/FBGEMM).

New submodule commit: pytorch/FBGEMM@9f2271b

Pull Request resolved: pytorch#73814

Test Plan: Ensure that CI jobs succeed on GitHub before landing.

Reviewed By: jspark1105

Differential Revision: D34658981

fbshipit-source-id: a7f119ce6b0446803f0cf1f4d0518b95319a3696
(cherry picked from commit 7e1b11c)