adding a link to the update docs todeployment landing page

Author: NathenSample

deploy.html

@@ -260,6 +260,7 @@ <h4>Articles </h4>
               <div class="col-md-11">
                 <h3>Deploying Logscape </h3>
                 <div class="side-box"> 
+                  <h4>Upgrade your environment</h4><a href="deploy-upgrade.html">Updating Logscape</a>
                   <h4>Deployment Scenarios </h4><a href="deploy-arch_clm.html">Centralized Log Management</a><br/><a href="deploy-arch_indexstores.html">Scale with  Index Stores </a><br/><a href="deploy-arch_zoning.html">Distributed Topology (Zoning) </a><br/><a href="technology-sizing.html">Sizing</a>
                 </div>
                 <p>A Logscape deployment will change in style depending on whether the user has a license or not, due to the restrictions upon <a href="deploy-agents.html">Agent Type</a> by default only the <a href="deploy-manager.html">Manager</a> and <a href="deploy-forwarder.html">Forwarder</a> agent roles are available, however adding a license to your Logscape installation will allow you to configure <a href="deploy-failover.html">Failovers, </a><a href="deploy-indexer.html">Indexers</a> and <a href="deploy-indexstore.html">Indexstores.</a></p>