minor #1250 Fixed some typos in UX Live Components code examples (rrenteria-dev)

This PR was merged into the 2.x branch.

Discussion
----------

Fixed some typos in UX Live Components code examples

Hey!

I fixed some code examples typos in the official UX Live components documentation.
Thanks in advance.

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| Issues        |
| License       | MIT

Commits
-------

fe98edefc9 Fixed UX Live Components code examples

Author: weaverryan

doc/index.rst

@@ -1715,7 +1715,7 @@ Now, create a Twig component to render the form::
         use DefaultActionTrait;
 
         #[LiveProp]
-        public initialFormData $post;
+        public Post $initialFormData;
 
         protected function instantiateForm(): FormInterface
         {
@@ -1759,7 +1759,6 @@ and ``removeComment()`` actions:
 
                 {{ form_widget(commentForm) }}
             {% endfor %}
-            </div>
 
             {# avoid an extra label for this field #}
             {% do form.comments.setRendered %}