Fix discord bot loading

src/de/steamwar/bungeecore/BungeeCore.java

@@ -278,7 +278,7 @@ public class BungeeCore extends Plugin {
                 config.getString("db.password")
         );
 
-        if (config.getSection("discord") != null) {
+        if (config.contains("discord")) {
             SteamwarDiscordBotConfig.loadConfig(config.getSection("discord"));
         }