Fix certificate expiry notif markdown

Changed the notification message for certificate expiry to use parenthesis for the link instead of the current square bracket to correctly mask the link in markdown-supported notification agents

Author: Hampo

server/model/monitor.js

@@ -1434,7 +1434,7 @@ class Monitor extends BeanModel {
         for (let notification of notificationList) {
             try {
                 log.debug("monitor", "Sending to " + notification.name);
-                await Notification.send(JSON.parse(notification.config), `[${this.name}][${this.url}] ${certType} certificate ${certCN} will be expired in ${daysRemaining} days`);
+                await Notification.send(JSON.parse(notification.config), `[${this.name}](${this.url}) ${certType} certificate ${certCN} will be expired in ${daysRemaining} days`);
                 sent = true;
             } catch (e) {
                 log.error("monitor", "Cannot send cert notification to " + notification.name);