Tutorial: Description fix - each block bindings (#5974)

The chapter highlights event binding in `each` block which is missing within the snippet. Thus it seems reasonable to include it within the description snippet block.

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

@@ -5,6 +5,7 @@ title: Each block bindings
 You can even bind to properties inside an `each` block.
 
 ```html
+{#each todos as todo}
 	<input
 		type=checkbox
 		bind:checked={todo.done}
@@ -14,6 +15,7 @@ You can even bind to properties inside an `each` block.
 		placeholder="What needs to be done?"
 		bind:value={todo.text}
 	>
+{/each}
 ```
 
 > Note that interacting with these `<input>` elements will mutate the array. If you prefer to work with immutable data, you should avoid these bindings and use event handlers instead.