better filename system

_includes/head.njk

@@ -19,7 +19,7 @@
 	<meta property="og:description" content="{{ metadata.description }}" />
 
 	<link rel="icon" type="image/x-icon" href="/favicon.ico">
-	<meta property="og:image" content="{{ metadata.url }}/favicon.ico" />
+	<meta property="og:image" content="{{ metadata.url }}/img/logo-light.png" />
 	<meta property="og:image:alt" content="blue and gold icon showing a greeting card with wings" />
 
 	<meta name="generator" content="{{ eleventy.generator }}">