Context([DateTimeNormalizer::FORMAT_KEY => 'Y-m-d H:i:s']),return object

[langziyang]

API Platform version(s) affected: 4.2.17

Description
Context([DateTimeNormalizer::FORMAT_KEY => 'Y-m-d H:i:s']) will return object, not string

How to reproduce

#[
        ORM\Column(type: Types::DATETIME_IMMUTABLE, nullable: true, options: ['comment' => '最后登录']),
        Context([DateTimeNormalizer::FORMAT_KEY => 'Y-m-d H:i:s']),
        ApiProperty(writable: false)
    ]
    #[Groups(['employee.read'])]
    public ?\DateTimeImmutable $lastLogin = null;

Possible Solution
4.2.15 it is ok

this is 4.2.15

this is 4.2.17