doc: add puskin to collaborators

Fixes: #58088
PR-URL: #58308
Reviewed-By: Marco Ippolito <marcoippolito54@gmail.com>
Reviewed-By: Pietro Marchini <pietro.marchini94@gmail.com>
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>

Author: puskin

.mailmap

@@ -204,6 +204,7 @@ George Adams <gadams@microsoft.com> <george.adams@uk.ibm.com>
 Gerhard Stöbich <deb2001-github@yahoo.de>
 Gibson Fahnestock <gibfahn@gmail.com> <gib@uk.ibm.com>
 Gil Pedersen <git@gpost.dk> <github@gpost.dk>
+Giovanni Bucci <github@puskin.it>
 Graham Fairweather <xotic750@gmail.com> <xotic750@gmail>
 Greg Sabia Tucker <greg@narrowlabs.com> <greg@tucke.rs>
 Gregor Martynus <gregor@martynus.net>

README.md

@@ -415,6 +415,8 @@ For information about the governance of the Node.js project, see
   **Tim Perry** <<pimterry@gmail.com>> (he/him)
 * [pmarchini](https://github.com/pmarchini)
   **Pietro Marchini** <<pietro.marchini94@gmail.com>> (he/him)
+* [puskin](https://github.com/puskin) -
+  **Giovanni Bucci** <<github@puskin.it>> (he/him)
 * [Qard](https://github.com/Qard) -
   **Stephen Belanger** <<admin@stephenbelanger.com>> (he/him)
 * [RafaelGSS](https://github.com/RafaelGSS) -