Update clustermaker.html

update link for clustermaker tutorial

tools/clustermaker.html

@@ -27,7 +27,7 @@ <h5>Documentation</h5>
 	<ul>
 	<li><a href="http://www.rbvi.ucsf.edu/cytoscape/cluster/clusterMaker.shtml" target="_blank">clusterMaker Website</a></li>
 	<li><a href="http://apps.cytoscape.org/apps/clustermaker2" target="_blank">clusterMaker at the Cytoscape App Store</a></li>
-	<li><a href="http://opentutorials.cgl.ucsf.edu/index.php/Tutorial:Cluster_Maker" target="_blank">Tutorial</a></li>
+	<li><a href="https://cytoscape.org/cytoscape-tutorials/protocols/clustermaker-app/#/title" target="_blank">Tutorial</a></li>
 	</ul>
 
 	<h5>Developer Resources</h5>