Add ahref verification meta tag

Author: AlexITC

_includes/head.html

@@ -18,6 +18,7 @@
         });
     </script>
 
+    <meta name="ahrefs-site-verification" content="98a1eabcb98fc5531d2ebe80aaf198f1a6317648849b9478e0900af17551b6a7">
     <meta charset="utf-8">
     <meta http-equiv="X-UA-Compatible" content="IE=edge">
     <meta name="viewport" content="width=device-width, initial-scale=1">
@@ -30,4 +31,4 @@
 
     {%- include custom-head.html -%}
 
-</head>
+</head>