fix guacamole icon

index.html

@@ -230,7 +230,7 @@
       <div class="card">
         <button form="guacamole" style="color: darkolivegreen; border-color: darkolivegreen">
           <div class="image">
-            <img src="https://raw.githubusercontent.com/apache/guacamole-website/master/images/guacamole-logo-64.png" width="64" alt="Guacamole">
+            <img src="https://raw.githubusercontent.com/apache/guacamole-website/main/images/logos/guac-classic-logo.svg" width="64" alt="Guacamole">
           </div>
           <div class="text">
             <h3>Guacamole</h3>