Update fbgemm submodule (#86054)
Reland of https://github.com/pytorch/pytorch/commit/481def752cc001ff8ac7e3b723ece11aa1110c77
Fixes https://github.com/pytorch/pytorch/issues/85956
Pull Request resolved: https://github.com/pytorch/pytorch/pull/86054
Approved by: https://github.com/xuzhao9
