Add link to tracker changelog

Author: Mark Jessop

index.html

@@ -80,7 +80,9 @@ <h2><i class="icon-question rfloat"></i>Welcome</h2>
             <div id="motda">  
                 <h4>User Guide</h4>
                 A User Guide for the tracker is <a href="https://github.com/projecthorus/sondehub-tracker/wiki/SondeHub-Tracker-User-Guide" target="_blank" rel="noopener">available here.</a>
-                
+                <br/>
+                <b>Check the <a href="https://github.com/projecthorus/sondehub-tracker/wiki/SondeHub%E2%80%90Tracker-Changelog" target="_blank" rel="noopener">SondeHub-Tracker Changelog</a> to find info on recent updates.</b>
+                <br/>
                 <h4>Radiosondes?</h4>
                 To learn more check out our 
                 <a href="https://www.youtube.com/watch?v=YBy-bXEWZeM" target="_blank" rel="noopener">LCA video</a>.</br>