docs: fix snippet

closes #8817

Author: dummdidumm

documentation/tutorial/06-bindings/05-textarea-inputs/text.md

@@ -4,8 +4,9 @@ title: Textarea inputs
 
 The `<textarea>` element behaves similarly to a text input in Svelte — use `bind:value` to create a two-way binding between the `<textarea>` content and the `value` variable:
 
+<!-- prettier-ignore -->
 ```svelte
-<textarea bind:value />
+<textarea bind:value={value} />
 ```
 
 In cases like these, where the names match, we can also use a shorthand form: