[caffe2] minor typo fix in fused_rowwise_nbitfake_conversion_ops.h comment (#39315)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/39315
As title
Test Plan: Just comment change
Reviewed By: jianyuh
Differential Revision: D21813196
fbshipit-source-id: 3ff6bcd3cc31a4820bf7c7a948123c9e968f5de2
