add notification channel for home assistant (#4541)

Co-authored-by: Frank Elsinga <frank@elsinga.de>
Co-authored-by: Seb <144435+rmtsrc@users.noreply.github.com>

server/notification-providers/home-assistant.js

@@ -23,6 +23,8 @@ class HomeAssistant extends NotificationProvider {
                     ...(notificationService !== "persistent_notification" && { data: {
                         name: monitorJSON?.name,
                         status: heartbeatJSON?.status,
+                        channel: "Uptime Kuma",
+                        icon_url: "https://github.com/louislam/uptime-kuma/blob/master/public/icon.png?raw=true",
                     } }),
                 },
                 {