Fixed bug that the generator which be used to generate amqp consumer …

…cannot work. (#6436)

src/Generator/stubs/amqp-consumer.stub

@@ -12,7 +12,7 @@ use PhpAmqpLib\Message\AMQPMessage;
 #[Consumer(exchange: 'hyperf', routingKey: 'hyperf', queue: 'hyperf', name: "%CLASS%", nums: 1)]
 class %CLASS% extends ConsumerMessage
 {
-    public function consumeMessage($data, AMQPMessage $message): string
+    public function consumeMessage($data, AMQPMessage $message): Result
     {
         return Result::ACK;
     }