ovsconf 2025: Updated News section and the side widgets.

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-July/000371.html>July 31 2025: OVS+OVN '25: Call for Participation</a>
+      </li>
       <li>
         <a href=https://mail.openvswitch.org/pipermail/ovs-announce/2025-June/000368.html>Jun 02 2025: Open vSwitch 3.5.1, 3.4.3 and 3.3.5 are available</a>
       </li>
@@ -76,9 +79,6 @@
       <li>
         <a href=https://mail.openvswitch.org/pipermail/ovs-announce/2022-October/000300.html>Oct 07 2022: Open vSwitch 3.0.1, 2.17.3, 2.16.5, 2.15.6, 2.14.7 and 2.13.9 are available</a>
       </li>
-      <li>
-        <a href=https://mail.openvswitch.org/pipermail/ovs-announce/2022-August/000294.html>Aug 15 2022: Open vSwitch 3.0.0 is Available</a>
-      </li>
     </ul>
   </div>
 </div>

index.html

@@ -61,9 +61,10 @@ <h2><strong>What is Open vSwitch?</strong></h2>
     <div class="widget-title">News</div>
     <div class="widget-body">
       <p>
-       The Open vSwitch and OVN Fall Conference 2024 will be held on Nov 20-21.
-       See the <a href="support/ovscon2024/index.html">Conference Site</a> for
-       more details.  Propose a talk by September 27.
+       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.
       </p>
     </div>
     <div class="widget-title">Join Open vSwitch Community</div>