Add missing comma to demosites.html

diff --git a/web/demosites.html b/web/demosites.html
index 2fa38802e485cce760928022a92294992adcdcda..6f6a4eafbf0b104d517f313f46200c25d529fb94 100644 (file)
--- a/web/demosites.html
+++ b/web/demosites.html
@@ -671,7 +671,7 @@ p {
                     can be set on any metric monitored by netdata.
                     Alarm <a href="https://github.com/firehol/netdata/wiki/health-monitoring#alarm-actions" target="_blank" data-ga-category="Outbound links" data-ga-action="Nav click" data-ga-label=AlarmNotifications>notifications</a>
                     are role-based and support dynamic thresholds, hysteresis and can be dispatched via multiple methods
-                    (such as email, slack.com, pushover.net, pushbullet.com telegram.org, twilio.com).
+                    (such as email, slack.com, pushover.net, pushbullet.com, telegram.org, twilio.com).
             </div>
             <div class=grid-cell><h3><span class=star>&#x2605;</span> In real-time</h3>
                 <p>netdata collects thousands of metrics per server <strong>per second</strong>,