Automated submodule update: FBGEMM (#54447)
Summary:
This is an automated pull request to update the first-party submodule for [pytorch/FBGEMM](https://github.com/pytorch/FBGEMM).
New submodule commit: https://github.com/pytorch/FBGEMM/commit/ffff7a3118ad5b2655333b4feae0ed64a8c60fca
Pull Request resolved: https://github.com/pytorch/pytorch/pull/54447
Test Plan: Ensure that CI jobs succeed on GitHub before landing.
Reviewed By: jspark1105
Differential Revision: D27242112
fbshipit-source-id: 768b1a40652b6c2f0710bd4bb655697daf45f756
