NCCL Comment typo fix (#40242)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/40242
Comment Typo in ProcessGroupNCCL
ghstack-source-id: 106088379
Test Plan: CI
Differential Revision: D22099219
fbshipit-source-id: ddce91e640d4eea54e0698166c6276aeffedeb1e
