Update changelog.

Author: Kasper Peeters

web2/cadabra2/source/changelog.html

@@ -24,6 +24,7 @@ <h3>github microtex branch (2.5.x)</h3>
   and aarch64 architectures.</li>
   <li>Removed deprecated GTK-3 features and cleaned up the UI.</li>
   <li>Fix bug in code to interrupt a running computation.</li>
+  <li>Added dynamical cell updates, e.g. to create animations.</li>
   <li>All changes of 2.4.5.</li>
 </ul>