bug #39672 [FrameworkBundle] Fix UidNormalizer priority (fancyweb)

This PR was merged into the 5.2 branch.

Discussion
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[FrameworkBundle] Fix UidNormalizer priority

| Q             | A
| ------------- | ---
| Branch?       | 5.2
| Bug fix?      | yes
| New feature?  | no
| Deprecations? | no
| Tickets       | -
| License       | MIT
| Doc PR        | -

`AbstractUid` implements `\JsonSerializable`. `JsonSerializableNormalizer` has a priority of `-900`, so it's actually this normalizer that is used instead of the good one. It does not change the result but it adds an extra layer.

Commits
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1c652a7649 [FrameworkBundle] Fix UidNormalizer priority

Author: nicolas-grekas

Resources/config/serializer.php

@@ -109,7 +109,7 @@
             ->tag('serializer.normalizer', ['priority' => 1000])
 
         ->set('serializer.normalizer.uid', UidNormalizer::class)
-            ->tag('serializer.normalizer', ['priority' => -915])
+            ->tag('serializer.normalizer', ['priority' => -890])
 
         ->set('serializer.normalizer.form_error', FormErrorNormalizer::class)
             ->tag('serializer.normalizer', ['priority' => -915])