fix(site-2): docs redirect page (#8718)

sites/svelte.dev/src/routes/docs/+layout.server.js

@@ -2,8 +2,8 @@ import { get_docs_data, get_docs_list } from '$lib/server/docs/index.js';
 
 export const prerender = true;
 
-export function load() {
+export function load({ url }) {
 	return {
-		sections: get_docs_list(get_docs_data())
+		sections: url.pathname === '/docs' ? [] : get_docs_list(get_docs_data())
 	};
 }