Update KubeCon 2025 events (de)

Signed-off-by: Dmitry Shurupov <[email protected]>

Author: shurup

content/de/_index.html

@@ -41,11 +41,11 @@ <h2>Die Herausforderungen bei der Migration von über 150 Microservices auf Kube
         <button id="desktopShowVideoButton" onclick="kub.showVideo()">Video ansehen</button>
 
     <h3>Nehmen Sie an der kommenden KubeCon + CloudNativeCon teil</h3>
-        <a href="https://events.linuxfoundation.org/kubecon-cloudnativecon-europe/" class="desktopKCButton"><strong>Europe</strong> (London, Apr 1-4)</a>
         <a href="https://events.linuxfoundation.org/kubecon-cloudnativecon-china/" class="desktopKCButton"><strong>China</strong> (Hongkong, Jun 10-11)</a>
         <a href="https://events.linuxfoundation.org/kubecon-cloudnativecon-japan/" class="desktopKCButton"><strong>Japan</strong> (Tokio, Jun 16-17)</a>
         <a href="https://events.linuxfoundation.org/kubecon-cloudnativecon-india/" class="desktopKCButton"><strong>India</strong> (Hyderabad, Aug 6-7)</a>
-        <a href="https://events.linuxfoundation.org/kubecon-cloudnativecon-north-america-2025/" class="desktopKCButton"><strong>North America</strong> (Atlanta, Nov 10-13)</a>
+        <a href="https://events.linuxfoundation.org/kubecon-cloudnativecon-north-america/" class="desktopKCButton"><strong>North America</strong> (Atlanta, Nov 10-13)</a>
+        <a href="https://events.linuxfoundation.org/kubecon-cloudnativecon-europe-2026/" class="desktopKCButton"><strong>Europe</strong> (Amsterdam, Mrz 23-26, 2026)</a>
 </div>
 <div id="videoPlayer">
     <iframe data-url="https://www.youtube.com/embed/H06qrNmGqyE?autoplay=1" frameborder="0" allowfullscreen></iframe>