[fix] link to discord (sveltejs#148)

Author: mellanslag-de

src/routes/+layout.svelte

@@ -32,7 +32,7 @@
 	<svelte:fragment slot="nav-right">
 		<NavItem external="https://kit.svelte.dev">SvelteKit</NavItem>
 
-		<NavItem external="/chat" title="Discord Chat">
+		<NavItem external="https://svelte.dev/chat" title="Discord Chat">
 			<span class="small">Discord</span>
 			<span class="large"><Icon name="message-square" /></span>
 		</NavItem>