doc: --enable-source-maps and prepareStackTrace are incompatible

document the fact that --enable-source-maps and prepareStackTrace are
incompatible, see #29994

PR-URL: https://github.com/nodejs/node/pull/30046


Reviewed-By: Gus Caplan <me@gus.host>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>