doc: improve net docs

Refer back to streams docs for further and more accurate
description of behavior details.

Refs: https://github.com/nodejs/node/issues/31916

PR-URL: https://github.com/nodejs/node/pull/32811


Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Denys Otrishko <shishugi@gmail.com>