doc,meta: update email addresses for misterdjules

Julien Gilli appears twice with two email addresses in the current
AUTHORS file. Use .mailmap to map one to the other (keeping the most
recent one). Also update email in the README from a (I believe invalid,
since it is not listed in the email repo aliases.json file) nodejs.org
email to the email they more recently committed with. Finally, re-run
`update-authors.js` so they only have one entry in AUTHORS.

PR-URL: #39433
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

.mailmap

@@ -212,6 +212,7 @@ Joshua S. Weinstein <josher19@users.sf.net>
 Joyee Cheung <joyeec9h3@gmail.com>
 Joyee Cheung <joyeec9h3@gmail.com> Joyee Cheung <joyee@igalia.com>
 Juan Soto <juan@juansoto.me>
+Julien Gilli <jgilli@netflix.com> <julien.gilli@joyent.com>
 Julien Klepatch <julien@julienklepatch.com>
 Julien Waechter <julien.waechter@gmail.com>
 Junliang Yan <john.yan1019@gmail.com>

AUTHORS

@@ -587,7 +587,7 @@ Ed Umansky <edumansky@gmail.com>
 Maurice Butler <maurice.butler@gmail.com>
 John Albietz <inthecloud247@gmail.com>
 Andrew Oppenlander <andrew.oppenlander@zipscene.com>
-Julien Gilli <julien.gilli@joyent.com>
+Julien Gilli <jgilli@netflix.com>
 Gabriel Wicke <wicke@wikidev.net>
 Jakob Gillich <jakob@gillich.me>
 Lucio M. Tato <luciotato@gmail.com>
@@ -2335,7 +2335,6 @@ Sintendo <bram.speeckaert@gmail.com>
 Nitish Sakhawalkar <nitsakh@icloud.com>
 André Cruz <andre@cabine.org>
 Josh Broomfield <josh.m.broomfield@gmail.com>
-Julien Gilli <jgilli@netflix.com>
 Umang Raghuvanshi <u@umangis.me>
 Duarte David <deltaduartedavid@gmail.com>
 Aleksey Chemakin <Dzenly@users.noreply.github.com>

README.md

@@ -382,7 +382,7 @@ For information about the governance of the Node.js project, see
 * [mildsunrise](https://github.com/mildsunrise) -
 **Alba Mendez** <me@alba.sh> (she/her)
 * [misterdjules](https://github.com/misterdjules) -
-**Julien Gilli** <jgilli@nodejs.org>
+**Julien Gilli** <jgilli@netflix.com>
 * [mmarchini](https://github.com/mmarchini) -
 **Mary Marchini** <oss@mmarchini.me> (she/her)
 * [mscdex](https://github.com/mscdex) -