Change hint message for field-choices-constraint

[sobolevn]

check= was deprecated in Django5.1
See https://github.com/django/django/blob/55855bc6d0d2a270eb34952c578ee352389367ad/django/db/models/constraints.py#L165-L170

[kalekseev]

@sobolevn shouldn't we use something like this "check" if django_version < 5.1 else "condition"?

[sobolevn]

Yes, you are right. condition was added in 5.1

[kalekseev]

Thanks!