feat: Update grace days when renewing

Author: lucasdotvin

src/Models/Subscription.php

@@ -113,6 +113,7 @@ public function renew(?Carbon $expirationDate = null): self
 
         $this->update([
             'expired_at' => $expirationDate,
+            'grace_days_ended_at' => $expirationDate->addDays($this->plan->grace_days),
         ]);
 
         event(new SubscriptionRenewed($this));