Update about.html

web/static/help/about.html

@@ -5,7 +5,7 @@
 </p>
 <p>We built Mattermost to help teams focus on what matters most to them. It works for us, we hope it works for you too.
 
-Learn more, or download the source code from <a href=http://mattermost.com>http://mattermost.com</a>.</p>
+Learn more, or download the source code from <a href=http://mattermost.org>http://mattermost.org</a>.</p>
 
 <h1>Join the community</h1>
 <p>To take part in the community building Mattermost, please consider sharing comments, feature requests, votes, and contributions. If you like the project, please Tweet about us at <a href=https://twitter.com/mattermosthq>@mattermosthq</a>.</p>