Change to hosted paypal favicon

docs/index.html

@@ -6,7 +6,7 @@
         <meta name="viewport" content="width=device-width, initial-scale=1">
         <meta name="description" content="">
         <meta name="author" content="">
-        <link rel="icon" href="../sample/images/favicon.ico">
+        <link rel="icon" href="https://www.paypalobjects.com/webstatic/icon/favicon.ico">
         <title>PayPal PHP SDK - Welcome</title>
         <!-- Bootstrap core CSS -->
         <link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.2/css/bootstrap.min.css" rel="stylesheet">