update url for pushkin in alert manager

Change-Id: I6a7c16c7b48af020527bd8ed815ef315f923d2fe
diff --git a/prometheus/alertmanager/notification/pushkin.yml b/prometheus/alertmanager/notification/pushkin.yml
index 9d27a8b..dd4f760 100644
--- a/prometheus/alertmanager/notification/pushkin.yml
+++ b/prometheus/alertmanager/notification/pushkin.yml
@@ -18,5 +18,5 @@
             enabled: true
             webhook_configs:
               pushkin-vip:
-                url: "http://${_param:alertmanager_notification_pushkin_host}:${_param:alertmanager_notification_pushkin_port}/webhook?app=stacklight"
+                url: "http://${_param:alertmanager_notification_pushkin_host}:${_param:alertmanager_notification_pushkin_port}/webhook?app=stacklight_alertmanager"
                 send_resolved: true