add links to favicon and apple touch icon

Author: deniak

templates/base.html.twig

@@ -73,6 +73,8 @@
         <meta name="robots" content="unavailable_after: {{ page.expiryDate }}"/>
     {% endif %}
     <link rel="home" href="https://www.w3.org/"/>
+    <link rel="shortcut icon" href="https://www.w3.org/favicon.ico"/>
+    <link rel="apple-touch-icon" href="https://www.w3.org/apple-touch-icon.png"/>
 
     {% block stylesheets %}
         <link rel="stylesheet" href="{{ asset('styles/core.css?ver=1.4', 'website-2021') }}" media="screen"/>