add .mailmap entry for myself

Author: Skgland

.mailmap

@@ -553,6 +553,9 @@ Simon Sapin <simon@exyr.org> <simon.sapin@exyr.org>
 Simonas Kazlauskas <git@kazlauskas.me> Simonas Kazlauskas <github@kazlauskas.me>
 Simonas Kazlauskas <git@kazlauskas.me> <simonas+t-compiler@kazlauskas.me>
 Siva Prasad <sivaauturic@gmail.com>
+Skgland <skgland@users.noreply.github.com>
+Skgland <skgland@users.noreply.github.com> <bb-github@t-online.de>
+Skgland <skgland@users.noreply.github.com> <bennet.blessmann+github@googlemail.com>
 Smittyvb <me@smitop.com>
 Srinivas Reddy Thatiparthy <thatiparthysreenivas@gmail.com>
 Stanislav Tkach <stanislav.tkach@gmail.com>