Update guide-v1.md

guide-v1.md

@@ -8,7 +8,7 @@ exclude_from_menu: true
 The latest developer guide can be found [here](guide.html)." %}
 
 {% include infobox.html content="The class reference for ExoPlayer 1.x can be found
-[here](http://google.github.io/ExoPlayer/doc/reference-v1)." %}
+[here](doc/reference-v1)." %}
 
 <div id="table-of-contents">
 <div id="table-of-contents-header">Contents</div>