Add CVE-2026-34956 advisory.

Signed-off-by: Ilya Maximets <i.maximets@ovn.org>

Author: igsilya

_includes/side-widgets.html

@@ -4,6 +4,9 @@
   </div>
   <div class="widget-body">
     <ul>
+      <li>
+        <a href=https://mail.openvswitch.org/pipermail/ovs-announce/2026-March/000393.html>Mar 31 2026: [ADVISORY] CVE-2026-34956: Invalid memory access in conntrack FTP alg</a>
+      </li>
       <li>
         <a href=https://mail.openvswitch.org/pipermail/ovs-announce/2026-March/000392.html>Mar 31 2026: Open vSwitch 3.7.1, 3.6.3, 3.5.4, 3.4.6 and 3.3.9 are available</a>
       </li>
@@ -76,9 +79,6 @@
       <li>
         <a href=https://mail.openvswitch.org/pipermail/ovs-announce/2023-July/000324.html>Jul 11 2023: [OVSCONF] OVS+OVN '23: Call for Participation</a>
       </li>
-      <li>
-        <a href=https://mail.openvswitch.org/pipermail/ovs-announce/2023-June/000322.html>Jun 27 2023: Open vSwitch 3.1.2 and 2.17.7 are available</a>
-      </li>
     </ul>
   </div>
 </div>