fix: avoid including the default OG image for docs (#1445)

Update +layout.svelte

Author: eltigerchino

apps/svelte.dev/src/routes/+layout.svelte

@@ -39,7 +39,7 @@
 </script>
 
 <svelte:head>
-	{#if !page.route.id || !page.route.id.startsWith('/blog/') || !/^\/docs\/[^\/]+\/[^\/]+$/.test(page.route.id)}
+	{#if !page.route.id || !(page.route.id.startsWith('/blog/') || /^\/docs\/[^\/]+\/[^\/]+$/.test(page.route.id))}
 		<meta name="twitter:card" content="summary" />
 		<meta name="twitter:image" content="https://svelte.dev/images/twitter-thumbnail.jpg" />
 		<meta name="og:image" content="https://svelte.dev/images/twitter-thumbnail.jpg" />