Added a fediverse creator meta tag

Author: lrotermund

layouts/partials/head.html

@@ -15,6 +15,7 @@
       | default .Title }}
     <meta name="description" content="{{ $summary }}">
   {{ end }}
+  <meta name="fediverse:creator" content="@[email protected]">
 
   <link rel="apple-touch-icon" sizes="180x180" href="{{ "apple-touch-icon.png" | absURL }}">
   <link rel="icon" type="image/png" sizes="32x32" href="{{ "favicon-32x32.png" | absURL }}">