Typo in GroupMembershipRequestValidator

Problem/Motivation

In the GroupMembershipRequest.php constraint message is
public $message = 'User "%name" is already a member of group';

but in the Validator the violation parameter is '@name'.

      $this->context->addViolation($constraint->message, [
        '@name' => $group_content->getEntity()->getDisplayName(),
      ]);

So the error message is 'User "%name" is already a member of group'