Automated submodule update: FBGEMM (#43251)
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/685149bbc0c9fbf63f65d61830b36a8753b1a00d
Pull Request resolved: https://github.com/pytorch/pytorch/pull/43251
Test Plan: Ensure that CI jobs succeed on GitHub before landing.
Reviewed By: YazhiGao
Differential Revision: D23207016
fbshipit-source-id: 54e13b246bb5189260ed11316ddf3d26d52c6b24
