[docs] adjust code snippet to conform with previous one

Backported from https://github.com/sveltejs/learn.svelte.dev/pull/143

site/content/tutorial/04-logic/06-await-blocks/text.md

@@ -19,7 +19,7 @@ Most web applications have to deal with asynchronous data at some point. Svelte
 If you know that your promise can't reject, you can omit the `catch` block. You can also omit the first block if you don't want to show anything until the promise resolves:
 
 ```html
-{#await promise then value}
+{#await promise then number}
-	<p>the value is {value}</p>
+	<p>the number is {number}</p>
 {/await}
 ```