doc: add emitClose option for fs streams

PR-URL: https://github.com/nodejs/node/pull/29212
Fixes: https://github.com/nodejs/node/issues/29177


Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>