Fix issue updating timezone in setting.json if the timezone is zero (https://github.com/espruino/BangleApps/issues/2575)

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/banglejs/BangleJSDeviceSupport.java

@@ -905,7 +905,7 @@ public class BangleJSDeviceSupport extends AbstractBTLEDeviceSupport {
       // set timezone
       cmd += "E.setTimeZone("+tz+");";
       // write timezone to settings
-      cmd += "(s=>{s&&(s.timezone="+tz+")&&require('Storage').write('setting.json',s);})(require('Storage').readJSON('setting.json',1))";
+      cmd += "(s=>s&&(s.timezone="+tz+",require('Storage').write('setting.json',s)))(require('Storage').readJSON('setting.json',1))";
       uartTx(builder, cmd+"\n");
     }