Fix url in meta

Author: javierbyte

index.html

@@ -11,7 +11,7 @@
     <meta name="description" content="This is a tool that can convert any image into a pure css image.">
 
     <meta property="og:title" content="img2css">
-    <meta property="og:url" content="http://javier.xyz/img2css">
+    <meta property="og:url" content="http://javier.xyz/img2css/">
     <meta property="og:image" content="http://javier.xyz/img2css/docs-assets/thumbnail.jpg">
 
     <link rel="stylesheet" href="styles/styles.css">