test: fix typo in test-quic-client-empty-preferred-address.js

PR-URL: https://github.com/nodejs/node/pull/33976


Reviewed-By: David Carlier <devnexen@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>