Fix $deliveryAt in RedisProducer::send by converting deliveryDelay milliseconds to seconds

Author: niels-nijens

Diff for: pkg/redis/RedisProducer.php

@@ -64,7 +64,7 @@ public function send(Destination $destination, Message $message): void
         $payload = $this->context->getSerializer()->toString($message);
 
         if ($message->getDeliveryDelay()) {
-            $deliveryAt = time() + $message->getDeliveryDelay();
+            $deliveryAt = time() + $message->getDeliveryDelay() / 1000;
             $this->context->getRedis()->zadd($destination->getName().':delayed', $payload, $deliveryAt);
         } else {
             $this->context->getRedis()->lpush($destination->getName(), $payload);