Update to Font Awesome Icon

Minor update to the Font Awesome version.

index.html.tmpl

@@ -65,7 +65,7 @@
     <!-- Font Awesome Icon links -->
    
     <!-- Free license -->
-    <link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.14.0/css/all.css" integrity="sha384-HzLeBuhoNPvSl5KYnjx0BT+WB0QEEqLprO+NBkkk5gbc67FTaL7XIGa2w1L0Xbgc" crossorigin="anonymous">
+    <link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.15.2/css/all.css" integrity="sha384-vSIIfh2YWi9wW0r9iZe7RJPrKwp6bG+s9QZMoITbCckVJqGCCRhc+ccxNcdpHuYu" crossorigin="anonymous">
     
     <!-- Script -->
     <script src="js/modernizr-2.6.2.min.js"></script>