deps: fix npm doctor tests for pre-release node

Refs: https://github.com/npm/cli/pull/2358

PR-URL: https://github.com/nodejs/node/pull/36543


Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Ruy Adorno <ruyadorno@github.com>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>