minor symfony#2170 [TwigComponent] Update index.rst (LaurentMarquet)

This PR was merged into the 2.x branch.

Discussion
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[TwigComponent] Update index.rst

Just removed a lasting " in code

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no <!-- please update src/**/CHANGELOG.md files -->
| Issues        | no
| License       | MIT

Commits
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675a707 Update index.rst

src/TwigComponent/doc/index.rst

@@ -348,7 +348,7 @@ close tag, it's passed to your component template as the block called
 
 .. code-block:: html+twig
 
-    <div {{ attributes.defaults({class: 'alert alert-' ~ type}) }}">
+    <div {{ attributes.defaults({class: 'alert alert-' ~ type}) }}>
         {% block content %}{% endblock %}
     </div>
 
@@ -1771,4 +1771,4 @@ https://symfony.com/doc/current/contributing/code/bc.html
 .. _`html_cva`: https://twig.symfony.com/doc/3.x/functions/html_cva.html
 .. _`shadcn/ui`: https://ui.shadcn.com
 .. _`tales-from-a-dev/twig-tailwind-extra`: https://github.com/tales-from-a-dev/twig-tailwind-extra
-.. _`ignore not defined options`: https://symfony.com/doc/current/components/options_resolver.html#ignore-not-defined-options
+.. _`ignore not defined options`: https://symfony.com/doc/current/components/options_resolver.html#ignore-not-defined-options