Fix the benchmark CI failure due to Opacus 1.5.4 (#2621)
Summary: Pull Request resolved: https://github.com/pytorch/benchmark/pull/2621
Reviewed By: atalman
Differential Revision: D75526267
fbshipit-source-id: 1af05936e108e1f7f0a9b6ad5ba64a99f8bc15a0