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b56e2eed - fixing typo in fp8_gemm

fixing typo in fp8_gemm Summary: put an extra `m` by mistake in one of the configs and it is breaking in OSS Reviewed By: plotfi Differential Revision: D64208508 fbshipit-source-id: f1461da0a5e883ffd4266206f5e3b737f468c3b2