meta: consolidate AUTHORS entry for thw0rted

Use a .mailmap entry to consolidate the two entries for thw0rted in
AUTHORS into one entry.

PR-URL: https://github.com/nodejs/node/pull/40387


Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>