add missing parameter for status message (#18115)

Signed-off-by: Bernd Weymann <bernd.weymann@gmail.com>

bundles/org.openhab.binding.mercedesme/src/main/java/org/openhab/binding/mercedesme/internal/server/MBWebsocket.java

@@ -225,8 +225,7 @@ public class MBWebsocket {
 
     @OnWebSocketError
     public void onError(Throwable t) {
-        logger.warn("onError {}", t.getMessage());
         accountHandler.updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.COMMUNICATION_ERROR,
-                "@text/mercedesme.account.status.websocket-failure");
+                "@text/mercedesme.account.status.websocket-failure [\"" + t.getMessage() + "\"]");
     }
 }