Add new notification channel (Gotify)

Author: tolaleng

public/uploads/notification/gotify.png

@@ -48,6 +48,11 @@ const NotificationSystem = () => {
       logo: "/uploads/notification/notifiarr.png",
       alt: "Notifiarr notifications"
     },
+    {
+      name: "Gotify",
+      logo: "/uploads/notification/gotify.png",
+      alt: "Gotify notifications"
+    },
     {
       name: "Webhook",
       logo: "/uploads/notification/webhook.png",