removed static sitename from icons file

Author: Andycko

templates/_includes/_global/icons.twig

@@ -5,8 +5,8 @@
     <link rel="manifest" href="/img/web-icons/manifest.json">
     <link rel="mask-icon" href="/img/web-icons/safari-pinned-tab.svg" color="#5bbad5">
     <link rel="shortcut icon" href="/img/web-icons/favicon.ico">
-    <meta name="apple-mobile-web-app-title" content="2020 Opticians">
-    <meta name="application-name" content="2020 Opticians">
+    <meta name="apple-mobile-web-app-title" content="{{ siteName }}">
+    <meta name="application-name" content="{{ siteName }}">
     <meta name="msapplication-TileColor" content="#2b5797">
     <meta name="msapplication-TileImage" content="/img/web-icons/mstile-150x150.png">
     <meta name="msapplication-config" content="/img/web-icons/browserconfig.xml">