doc: fix process links to console.log/error

Fixes: https://github.com/nodejs/node/issues/11717

PR-URL: https://github.com/nodejs/node/pull/11718


Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Сковорода Никита Андреевич <chalkerx@gmail.com>
Reviewed-By: Franziska Hinkelmann <franziska.hinkelmann@gmail.com>
Reviewed-By: Brian White <mscdex@mscdex.net>