docs: expand on async Svelte in Remote Functions (sveltejs#14228)

* Update 60-remote-functions.md

* Apply suggestion from @eltigerchino

* Apply suggestion from @eltigerchino

* Apply suggestion from @eltigerchino

* Apply suggestion from @eltigerchino

* Update documentation/docs/20-core-concepts/60-remote-functions.md

---------

Co-authored-by: Rich Harris <richard.a.harris@gmail.com>
Co-authored-by: Rich Harris <rich.harris@vercel.com>

Author: 2 people

documentation/docs/20-core-concepts/60-remote-functions.md

@@ -10,7 +10,7 @@ Remote functions are a tool for type-safe communication between client and serve
 
 Combined with Svelte's experimental support for [`await`](/docs/svelte/await-expressions), it allows you to load and manipulate data directly inside your components.
 
-This feature is currently experimental, meaning it is likely to contain bugs and is subject to change without notice. You must opt in by adding the `kit.experimental.remoteFunctions` option in your `svelte.config.js`:
+This feature is currently experimental, meaning it is likely to contain bugs and is subject to change without notice. You must opt in by adding the `kit.experimental.remoteFunctions` option in your `svelte.config.js` and optionally, the `compilerOptions.experimental.async` option to use `await` in components:
 
 ```js
 /// file: svelte.config.js
@@ -20,6 +20,11 @@ const config = {
 		experimental: {
 			+++remoteFunctions: true+++
 		}
+	},
+	compilerOptions: {
+		experimental: {
+			+++async: true+++
+		}
 	}
 };
 
@@ -90,6 +95,8 @@ While using `await` is recommended, as an alternative the query also has `loadin
 	const query = getPosts();
 </script>
 
+<h1>Recent posts</h1>
+
 {#if query.error}
 	<p>oops!</p>
 {:else if query.loading}