fix missing }, reformat so it's visible

```twig
<div {{ stimulus_controller('chart',
            { 'name': 'Likes', 'data': [1, 2, 3, 4] },
            { 'loading': 'spinner' },
            { 'other': '.target' } ) }}>
```

Author: tacman

src/StimulusBundle/doc/index.rst

@@ -240,7 +240,10 @@ And with outlets:
 
 .. code-block:: html+twig
 
-    <div {{ stimulus_controller('chart', { 'name': 'Likes', 'data': [1, 2, 3, 4] }, { 'loading': 'spinner' }, { 'other': '.target' ) }}>
+    <div {{ stimulus_controller('chart',
+            { 'name': 'Likes', 'data': [1, 2, 3, 4] },
+            { 'loading': 'spinner' },
+            { 'other': '.target' } ) }}>
         Hello
     </div>