doc: update mmarchini's e-mail

PR-URL: #22776
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>

.mailmap

@@ -233,8 +233,9 @@ Marti Martz <thalamew@q.com>
 Martial James Jefferson <martial.jefferson@gmail.com>
 Martijn Schrage <martijn@oblomov.com> Oblosys <martijn@oblomov.com>
 Masato Ohba <over.rye@gmail.com>
-Matheus Marchini <matheusdot@gmail.com> <matheus@sthima.com.br>
-Matheus Marchini <matheusdot@gmail.com> <matheus@sthima.com>
+Matheus Marchini <mat@mmarchini.me> <matheusdot@gmail.com>
+Matheus Marchini <mat@mmarchini.me> <matheus@sthima.com.br>
+Matheus Marchini <mat@mmarchini.me> <matheus@sthima.com>
 Matt Lang <matt@mediasuite.co.nz> matt-in-a-hat <matt@mediasuite.co.nz>
 Matt Reed <matthewreed26@gmail.com> matthewreed26 <matthewreed26@gmail.com>
 Matthias Bastian <dev@matthias-bastian.de> piepmatz <piepmatz@users.noreply.github.com>

AUTHORS

@@ -1982,7 +1982,7 @@ Pierre-Loic Doulcet <pierre@pld.io>
 Fran Herrero <francisco.herrero@axa-groupsolutions.com>
 Francois KY <ky.francois.3@gmail.com>
 suman-mitra <summitra@in.ibm.com>
-Matheus Marchini <matheusdot@gmail.com>
+Matheus Marchini <mat@mmarchini.me>
 neta <neta@netush>
 Whien <sal95610@gmail.com>
 Chiahao Lin <y80811@gmail.com>

README.md

@@ -446,7 +446,7 @@ For more information about the governance of the Node.js project, see
 * [misterdjules](https://github.com/misterdjules) -
 **Julien Gilli** <jgilli@nodejs.org>
 * [mmarchini](https://github.com/mmarchini) -
-**Matheus Marchini** <matheus@sthima.com>
+**Matheus Marchini** <mat@mmarchini.me>
 * [MoonBall](https://github.com/MoonBall) -
 **Chen Gang** <gangc.cxy@foxmail.com>
 * [mscdex](https://github.com/mscdex) -