monitor path as a notification title mattermost (#3801)

server/notification-providers/mattermost.js

@@ -78,12 +78,12 @@ class Mattermost extends NotificationProvider {
                     {
                         fallback:
                             "Your " +
-                            monitorJSON.name +
+                            monitorJSON.pathName +
                             " service went " +
                             statusText,
                         color: color,
                         title:
-                            monitorJSON.name +
+                            monitorJSON.pathName +
                             " service went " +
                             statusText,
                         title_link: monitorJSON.url,