Add missing parent <div> element to code example.

In the previous commit, the missing `{#each}` tags were restored, which is helpful -- but it left out the `<div>` that wraps the `<input>`s. If a reader were copying from the example into the workspace, they would notice the styles breaking as a result. This change is intended to clarify that the parent `<div>` element should remain intact.

site/content/tutorial/06-bindings/09-each-block-bindings/text.md

@@ -6,6 +6,7 @@ You can even bind to properties inside an `each` block.
 
 ```html
 {#each todos as todo}
+	<div class:done={todo.done}>
 		<input
 			type=checkbox
 			bind:checked={todo.done}
@@ -15,6 +16,7 @@ You can even bind to properties inside an `each` block.
 			placeholder="What needs to be done?"
 			bind:value={todo.text}
 		>
+	</div>
 {/each}
 ```