Update header.html

Author: pedra

Config/Devbr/Html/header.html

@@ -9,7 +9,7 @@
         <meta property="og:title" content="Hello World">
         <meta property="og:type" content="website">
         <meta property="og:url" content="https://github.com/devbr/website/">
-        <meta property="og:image" content="<x:url/>img/db64.png">
+        <meta property="og:image" content="/img/db64.png">
         <meta property="og:site_name" content="devbr - website">
         <meta property="og:description" content="Core for PHP websites">
         <link rel="apple-touch-icon" sizes="57x57" href="/img/apple-icon-57x57.png">