ovsconf 2025: News section and the side widgets for deadline extension.

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/2025-September/000375.html>Sep 03 2025: OVS+OVN '25: Deadline Extension</a>
+      </li>
       <li>
         <a href=https://mail.openvswitch.org/pipermail/ovs-announce/2025-August/000374.html>Aug 29 2025: Open vSwitch 3.5.2, 3.4.4, 3.3.6 and 3.2.6 are available</a>
       </li>
@@ -76,9 +79,6 @@
       <li>
         <a href=https://mail.openvswitch.org/pipermail/ovs-announce/2022-December/000313.html>Dec 20 2022: [ADVISORY] LLDP underflow while parsing malformed Auto Attach TLV</a>
       </li>
-      <li>
-        <a href=https://mail.openvswitch.org/pipermail/ovs-announce/2022-December/000312.html>Dec 20 2022: Open vSwitch 3.0.3, 2.17.5, 2.16.6, 2.15.7, 2.14.8 and 2.13.10 are available</a>
-      </li>
     </ul>
   </div>
 </div>

index.html

@@ -64,7 +64,7 @@ <h2><strong>What is Open vSwitch?</strong></h2>
        The Open vSwitch and OVN Fall Conference 2025 will be held on Nov 19-20
        as a hybrid event in Prague, Czech Republic.
        See the <a href="support/ovscon2025/index.html">Conference Site</a> for
-       more details.  Propose a talk by September 8th.
+       more details.  Propose a talk by September 22nd.
       </p>
     </div>
     <div class="widget-title">Join Open vSwitch Community</div>