Automated submodule update: FBGEMM (pytorch#59170)

Summary:
Pull Request resolved: pytorch#59170

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@ffc2e1a

Pull Request resolved: pytorch#58874

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

Reviewed By: hx89

Differential Revision: D28648577

Pulled By: jspark1105

fbshipit-source-id: 0ad1a6fdf27cd3f05f9e342030461cb7caa9986b