doc: add RafaelGSS to collaborators

Fixes: nodejs#42527

PR-URL: nodejs#42718
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Richard Lau <rlau@redhat.com>
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Darshan Sen <raisinten@gmail.com>

README.md

@@ -396,6 +396,8 @@ For information about the governance of the Node.js project, see
   **Andrey Pechkurov** <<apechkurov@gmail.com>> (he/him)
 * [Qard](https://github.com/Qard) -
   **Stephen Belanger** <<admin@stephenbelanger.com>> (he/him)
+* [RafaelGSS](https://github.com/RafaelGSS) -
+  **Rafael Gonzaga** <<rafael.nunu@hotmail.com>> (he/him)
 * [RaisinTen](https://github.com/RaisinTen) -
   **Darshan Sen** <<raisinten@gmail.com>> (he/him)
 * [rexagod](https://github.com/rexagod) -