[quant][graphmode][fx][fix] Fix typo in fusion (#49183)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/49183
Test Plan: Imported from OSS
Reviewed By: hx89
Differential Revision: D25473367
fbshipit-source-id: 0cd5e6769eeea0923dd104ea90b0192e3475b3ad
