Refactor: Make the observable match the new Notification logic

src/utils/NotificationObservable.java

@@ -22,7 +22,7 @@ public class NotificationObservable {
         for (final var subscriber : this.subscribers) {
             for (final var notificationType : subscriber.notificationsTypes()) {
                 var notification = factory.createNotification(notificationType, content, subscriber, subscriber.chosenNotificationStrategy());
-                notification.send();
+                System.out.println(notification.getContent());
             }
         }
     }