Fix the check if contribution is payed on quarterly payments

The check was broken. In most cases, the contribution should
be considered "payed" when at least one payment happened
during the last 3 months when the subscription type is
quarterly.

src/Entity/Member.php

@@ -271,8 +271,8 @@ public function isContributionCompleted(DateTime $when) {
                 $payments = $this->contributionPayments->filter(fn($payment) => $payment->getPeriodYear() == $year && $payment->getPeriodMonthStart() == $month);
                 break;
             case self::PERIOD_QUARTERLY:
-                $quarter = ceil($month / 3);
-                $payments = $this->contributionPayments->filter(fn($payment) => $payment->getPeriodYear() == $year && $payment->getPeriodMonthStart() <= $month && $payment->getPeriodMonthEnd() >= $month);
+                $when->modify('-3 months');
+                $payments = $this->contributionPayments->filter(fn($payment) => $payment->getPaymentTime() >= $when);
                 break;
             case self::PERIOD_ANNUALLY:
                 $payments = $this->contributionPayments->filter(fn($payment) => $payment->getPeriodYear() == $year);