refactor: Swap the OG image to one including the Preact name

Author: rschristian

index.html

@@ -9,7 +9,7 @@
 		<meta name="theme-color" content="#673AB8">
 		<link rel="alternate" type="application/rss+xml" href="https://preactjs.com/feed.xml">
 		<link rel="alternate" type="application/atom+xml" href="https://preactjs.com/feed.atom">
-		<meta property="og:image" content="https://preactjs.com/app-icon.png">
+		<meta property="og:image" content="%DEPLOY_PRIME_URL%/og-image.png">
 		<meta name="twitter:card" content="summary">
 		<link href="https://cdn.jsdelivr.net" rel="preconnect" crossorigin="anonymous">
 	</head>