chore: update German newsfeed worldState message (#2788)

I found "Trete" might fit slightly better due to sounding more natural than "Tritt". Also sounds slightly more welcoming this way

Reviewed-on: #2788
Co-authored-by: Animan8000 <animan8000@noreply.localhost>
Co-committed-by: Animan8000 <animan8000@noreply.localhost>

static/fixed_responses/worldState/worldState.json

@@ -6,7 +6,7 @@
       "Messages": [
         { "LanguageCode": "fr", "Message": "Rejoignez le Discord OpenWF!" },
         { "LanguageCode": "it", "Message": "Unisciti al Discord di OpenWF!" },
-        { "LanguageCode": "de", "Message": "Tritt dem OpenWF Discord bei!" },
+        { "LanguageCode": "de", "Message": "Trete dem OpenWF Discord bei!" },
         { "LanguageCode": "es", "Message": "Únete al Discord de OpenWF!" },
         { "LanguageCode": "pt", "Message": "Junte-se ao Discord do OpenWF!" },
         { "LanguageCode": "ru", "Message": "Присоединяйтесь к OpenWF Discord!" },