doc: change the 'txt' to 'console' for a command

This is the document formation, because `node` is a command to be
executed, we should reguard it as a command prompt instead of a command
txt type.

PR-URL: https://github.com/nodejs/node/pull/29389


Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>