mailmap: add toastal

Author: toastal

.mailmap

@@ -26,6 +26,9 @@ Sandro Jäckel <sandro.jaeckel@gmail.com>
 Sandro Jäckel <sandro.jaeckel@gmail.com> <sandro.jaeckel@sap.com>
 superherointj <5861043+superherointj@users.noreply.github.com>
 Tomodachi94 <tomodachi94@protonmail.com> Tomo <68489118+Tomodachi94@users.noreply.github.com>
+toastal <toastal@posteo.net>
+toastal <toastal@posteo.net> <561087+toastal@users.noreply.github.com>
+toastal <toastal@posteo.net> <toastal@protonmail.com>
 Vladimír Čunát <v@cunat.cz> <vcunat@gmail.com>
 Vladimír Čunát <v@cunat.cz> <vladimir.cunat@nic.cz>
 Yifei Sun <ysun@hey.com>