Fixed typo for `ResponseCode::PrecoditionFailed`#307

Gsantomaggio merged 2 commits intorabbitmq:mainrabbitmq/rabbitmq-stream-rust-client:mainfrom

Mpinyaz:fix/typo-responsecode-preconditionMpinyaz/rabbitmq-stream-rust-client:fix/typo-responsecode-preconditionCopy head branch name to clipboard