Update learn.php

learn.php

@@ -20,7 +20,7 @@ $list = $_GET['list'] ?? 'test';
     <link rel="manifest" href="/manifest.json">
     <link rel="stylesheet" href="/assets/css/style.css">
     <link rel="apple-touch-icon" sizes="180x180" href="/assets/img/apple-touch-icon.png">
-    <link rel="icon" type="image/png" sizes="32x32" href="/assets/img/favicon-32x32.png">
+    <link rel="icon" type="image/png" sizes="32x32" href="/assets/img/favicon.ico">
     <link rel="icon" type="image/png" sizes="16x16" href="/assets/img/favicon-16x16.png">
 </head>