fix patch test

html/about/support/help.html

@@ -4,7 +4,7 @@
   <meta charset="UTF-8">
   <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1">
   <title>Help - syu.is</title>
-  <link rel="icon" type="image/png" href="/static/favicon.png">
+  <link rel="icon" type="image/png" href="{{ .StaticCDNHost }}/static/favicon.png">
   <style>
     * { box-sizing: border-box; margin: 0; padding: 0; }
     body {
@@ -89,3 +89,12 @@
     <li><a href="/about/support/privacy-policy">Privacy Policy</a></li>
     <li><a href="/about/support/license">License</a></li>
     <li><a href="/about/support/app">App Info</a></li>
+    <li><a href="https://atproto.com" target="_blank">AT Protocol Documentation</a></li>
+  </ul>
+
+  <div class="footer">
+    <p>Last updated: 2025</p>
+    <p>&copy; syu.is</p>
+  </div>
+</body>
+</html>