Mention the update for ContextMenu in release note (#11315)

all/src/main/templates/release-notes.html

@@ -84,7 +84,7 @@
 
         <ul>
             <li>Improvements in <tt>MenuBar</tt> client-side customization.</tt></li>
-            <li>Support for improved version of <tt>ContextMenu</tt> add-on (version 3.0.0.beta1).</li>
+            <li>Support for improved version of <tt>ContextMenu</tt> add-on (version 3.0.0).</li>
             <li>Rewrite <tt>OSGi</tt> bundles activation mechanism to follow <tt>OSGi</tt> best practices</li>
             <li>Change the return type of <tt>Grid.asMultiSelect</tt> and <tt>Grid.asSingleSelect</tt> that has API to access the features of corresponding selection model</li>
         </ul>