uitask: bring back buzzer toggle on tracker l1

variants/wio-tracker-l1/target.cpp

@@ -24,7 +24,7 @@ EnvironmentSensorManager sensors = EnvironmentSensorManager();
   MomentaryButton user_btn(PIN_USER_BTN, 1000, true, false, false);
   MomentaryButton joystick_left(JOYSTICK_LEFT, 1000, true, false, false);
   MomentaryButton joystick_right(JOYSTICK_RIGHT, 1000, true, false, false);
-  MomentaryButton back_btn(PIN_BACK_BTN, 1000, true, false, false);
+  MomentaryButton back_btn(PIN_BACK_BTN, 1000, true, false, true);
 #endif
 
 bool radio_init() {