[www] Fix 2025.2 Flamingo's release notes link

Change-Id: I2854a7c9a5bd719c4e4db6cd6edf04108b7c9c5a
Signed-off-by: Elod Illes <elod.illes@est.tech>

www/2025.2/index.html

@@ -13,7 +13,7 @@
       <div class="docs-link-sections">
         <h3 id="release-notes"><i class="fa fa-refresh"></i>Release Notes</h3>
         <p>New features, upgrade and deprecation notes, known issues, and bug fixes</p>
-        <a href="https://releases.openstack.org/epoxy/index.html">OpenStack Projects Release Notes</a>
+        <a href="https://releases.openstack.org/flamingo/index.html">OpenStack Projects Release Notes</a>
         <a href="/releasenotes/openstack-manuals/index.html">OpenStack Documentation Release Notes</a>
       </div>
       <div class="docs-link-sections">