Add myself as a translator (#3370)

options/locale/TRANSLATORS

@@ -62,6 +62,7 @@ Thiago Avelino
 Thomas Fanninger <gogs DOT thomas AT fanninger DOT at>
 Tilmann Bach <tilmann AT outlook DOT com>
 Toni Villena Jiménez <tonivj5 AT gmail DOT com>
+Viktor Sperl <viktike32 AT gmail DOT com>
 Vladimir Jigulin mogaika AT yandex DOT ru
 Vladimir Vissoultchev <wqweto AT gmail DOT com>
 YJSoft <yjsoft AT yjsoft DOT pe DOT kr>