Chore: Add KubeCon EU 2026 to Announcement banner

Signed-off-by: thisisobate <[email protected]>

Author: thisisobate

docs/layouts/partials/community-banner.html

@@ -1,4 +1,12 @@
 <div class="td-community-banner">
+    <a class="td-community-banner__link" href="https://events.linuxfoundation.org/kubecon-cloudnativecon-europe/register/?utm_source=tetragon&utm_medium=homepage&utm_campaign=18269725-KubeCon-EU-2026&utm_content=hero" target="_blank">
+        <span class="td-community-banner__text">
+            Join the global cloud native community at KubeCon + CloudNativeCon Europe 2026
+            <span class="td-community-banner__main-text">
+                Register Now
+            </span>
+        </span>
+    </a>
     <a class="td-community-banner__link" href="https://isogo.to/tetragon-meeting-notes" target="_blank"
         rel="noopener noreferrer">
         <span class="td-community-banner__text">