Update the documentation.shtml file.

doc/html/documentation.shtml

@@ -42,6 +42,7 @@ Documentation for other versions of Slurm is distributed with the code</b></p>
 <li><a href="cpu_management.html">CPU Management User and Administrator Guide</a></li>
 <li><a href="nonstop.html">Failure Management Support</a></li>
 <li><a href="big_sys.html">Large Cluster Administration Guide</a></li>
+<li><a href="licenses.html">License Management</a></li>
 <li><a href="power_save.html">Power Saving Guide</a></li>
 <li><a href="prolog_epilog.html">Prolog and Epilog Guide</a></li>
 <li><a href="troubleshoot.html">Troubleshooting Guide</a></li>