doc: fix function name in process.md

setUncaughtExceptionCapture -> setUncaughtExceptionCaptureCallback

process.setUncaughtExceptionCaptureCallback and its docs were originally
added in https://github.com/nodejs/node/pull/17159

PR-URL: https://github.com/nodejs/node/pull/21523


Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Vse Mozhet Byt <vsemozhetbyt@gmail.com>