fix type

Author: Rich-Harris

apps/svelte.dev/src/routes/(authed)/playground/[id]/embed/+page.svelte

@@ -8,7 +8,7 @@
 
 	let { data } = $props();
 
-	let repl = $state() as Repl;
+	let repl = $state() as ReturnType<typeof Repl>;
 
 	onMount(() => {
 		if (data.version !== 'local') {

packages/repl/src/routes/+page.svelte

@@ -3,7 +3,7 @@
 	import { onMount } from 'svelte';
 	import '@sveltejs/site-kit/styles/index.css';
 
-	let repl: Repl;
+	let repl: ReturnType<typeof Repl>;
 
 	onMount(() => {
 		repl.set({