Fix typos in .circleci/README.md (#23588)
Summary:
Fix typos in .circleci/README.md
Pull Request resolved: https://github.com/pytorch/pytorch/pull/23588
Differential Revision: D16581934
Pulled By: ezyang
fbshipit-source-id: 39bf07e8d9d80493e15ecba7e846097ef44a6851
