minor symfony#58055 [Form] Fix info for the calendar option of the DateType form type (alexandre-daubois)

This PR was merged into the 7.2 branch.

Discussion
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[Form] Fix info for the `calendar` option of the `DateType` form type

| Q             | A
| ------------- | ---
| Branch?       | 7.2
| Bug fix?      | yes
| New feature?  | no
| Deprecations? | no
| Issues        | -
| License       | MIT

Detected while writing the documentation. The option should also accept `IntlDateFormatter` constants, so `int` is missing from allowed types of the option.

Commits
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0aeb058 [Form] Fix info for the `calendar` option of the `DateType` form type

Author: nicolas-grekas

src/Symfony/Component/Form/Extension/Core/Type/DateType.php

@@ -323,7 +323,7 @@ public function configureOptions(OptionsResolver $resolver): void
         $resolver->setAllowedTypes('input_format', 'string');
         $resolver->setAllowedTypes('calendar', ['null', \IntlCalendar::class]);
 
-        $resolver->setInfo('calendar', 'The calendar to use for formatting and parsing the date. The value should be one of the \IntlDateFormatter calendar constants or an instance of the \IntlCalendar to use.');
+        $resolver->setInfo('calendar', 'The calendar to use for formatting and parsing the date. The value should be an instance of \IntlCalendar. By default, the Gregorian calendar with the default locale is used.');
 
         $resolver->setNormalizer('html5', static function (Options $options, $html5) {
             if ($html5 && 'single_text' === $options['widget'] && self::HTML5_FORMAT !== $options['format']) {