Use smaller icon for og:image (#87)

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

Author: kixelated

src/layouts/global.astro

@@ -45,8 +45,8 @@ const ogImage = new URL(frontmatter?.cover ?? "/layout/icon.png", siteUrl).toStr
 		<meta property="og:url" content={pageUrl} />
 		<meta property="og:site_name" content="Media over QUIC" />
 		<meta property="og:image" content={ogImage} />
-		<meta property="og:image:width" content="650" />
-		<meta property="og:image:height" content="600" />
+		<meta property="og:image:width" content="325" />
+		<meta property="og:image:height" content="300" />
 
 		<!-- Twitter Card -->
 		<meta name="twitter:card" content="summary_large_image" />