Upstream serializer changes breaking tests

[GwendolenLynch]

API Platform version(s) affected: 3.3.0-beta

Description
The following Symfony PR breaks serialization in some Behat tests https://github.com/symfony/symfony/pull/54531

How to reproduce

composer config minimum-stability dev
composer update
php -d memory_limit=-1 ./vendor/bin/behat --profile=default --format=progress features/graphql/query.feature:366-377

001 Scenario: Query a serialized name                                             # features/graphql/query.feature:366
      Then the JSON node "data.dummyCar.carBrand" should be equal to "DummyBrand" # features/graphql/query.feature:376
        Failed to evaluate expression 'data.dummyCar.carBrand' (Exception)

[soyuka]

I thought I fixed that https://github.com/api-platform/core/commit/3643152d6eb1d36dabb266eeaaf9e530d5fec254

[stale[bot]]

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