Update main.html

Author: tatarincev

overrides/main.html

@@ -18,7 +18,7 @@
 {% endif %}
 
 {% block announce %}
-  <a href="/new">A new "preview" version of the documentation is available! - click to preview</a>
+  We are revamping our documentation portal! Check out its beta version <a href="/new">here</a>
 {% endblock %}
 
 {% block htmltitle %}