mailmap: update saghul's main email address

Author: saghul

.mailmap

@@ -47,8 +47,8 @@ Sakthipriyan Vairamani <thechargingvolcano@gmail.com>
 Sam Roberts <vieuxtech@gmail.com> <sam@strongloop.com>
 San-Tai Hsu <vanilla@fatpipi.com>
 Santiago Gimeno <santiago.gimeno@quantion.es> <santiago.gimeno@gmail.com>
-Saúl Ibarra Corretgé <saghul@gmail.com>
-Saúl Ibarra Corretgé <saghul@gmail.com> <s@saghul.net>
+Saúl Ibarra Corretgé <s@saghul.net>
+Saúl Ibarra Corretgé <s@saghul.net> <saghul@gmail.com>
 Shigeki Ohtsu <ohtsu@iij.ad.jp> <ohtsu@ohtsu.org>
 Shuowang (Wayne) Zhang <shuowang.zhang@ibm.com>
 TK-one <tk5641@naver.com>