docs: fix tutorial edit link (sveltejs#8812)

Fixes sveltejs#8811

Author: ignatiusmb

sites/svelte.dev/src/routes/tutorial/[slug]/+page.svelte

@@ -47,7 +47,7 @@
 	$: if (scrollable) data.tutorial, scrollable.scrollTo(0, 0);
 
 	$: selected = lookup.get(data.slug);
-	$: improve_link = `https://github.com/sveltejs/svelte/tree/master/documentation/content/tutorial/${data.tutorial.dir}`;
+	$: improve_link = `https://github.com/sveltejs/svelte/tree/master/documentation/tutorial/${data.tutorial.dir}`;
 
 	const clone = (file) => ({
 		name: file.name.replace(/.\w+$/, ''),