docs: microservice-kafka

- there is no `partition` in `context.getMesaage()`

Author: mmRoshani

content/microservices/kafka.md

@@ -319,14 +319,16 @@ To access the original Kafka `IncomingMessage` object, use the `getMessage()` me
 @MessagePattern('hero.kill.dragon')
 killDragon(@Payload() message: KillDragonMessage, @Ctx() context: KafkaContext) {
   const originalMessage = context.getMessage();
-  const { headers, partition, timestamp } = originalMessage;
+  const partition = context.getPartition();
+  const { headers, timestamp } = originalMessage;
 }
 @@switch
 @Bind(Payload(), Ctx())
 @MessagePattern('hero.kill.dragon')
 killDragon(message, context) {
   const originalMessage = context.getMessage();
-  const { headers, partition, timestamp } = originalMessage;
+  const partition = context.getPartition();
+  const { headers, timestamp } = originalMessage;
 }
 ```