minor symfony#23765 [FrameworkBundle] Fix comment (Lctrs)

This PR was merged into the 3.3 branch.

Discussion
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[FrameworkBundle] Fix comment

| Q             | A
| ------------- | ---
| Branch?       | 3.3
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | no
| Fixed tickets |
| License       | MIT
| Doc PR        |

Actually, DataUriNormalizer runs before the serializer.normalizer.object since it has a higher priority (-920 vs -1000).

Commits
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103b23e Fix comment

Author: nicolas-grekas

src/Symfony/Bundle/FrameworkBundle/DependencyInjection/FrameworkExtension.php

@@ -1273,7 +1273,7 @@ private function registerSecurityCsrfConfiguration(array $config, ContainerBuild
     private function registerSerializerConfiguration(array $config, ContainerBuilder $container, XmlFileLoader $loader)
     {
         if (class_exists('Symfony\Component\Serializer\Normalizer\DataUriNormalizer')) {
-            // Run after serializer.normalizer.object
+            // Run before serializer.normalizer.object
             $definition = $container->register('serializer.normalizer.data_uri', DataUriNormalizer::class);
             $definition->setPublic(false);
             $definition->addTag('serializer.normalizer', array('priority' => -920));