Update file composer.json for intl requirements with sf 7

Valentin Hoaraurequested to merge
issue/field_validation-3622470:3622470-update-symfonyintl-to into 3.0.x

Closes #3622470

Relax symfony/intl from ^6.3 to ^6.3 || ^7 so Field Validation 3.x can be installed with Drupal 11 projects using Symfony 7, without dropping Symfony support for 6.3+

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