Miss topic in the KafkaServiceManagementServiceClient (#5326)

Co-authored-by: NDaming <zteny@foxmail.com>

apm-sniffer/optional-reporter-plugins/kafka-reporter-plugin/src/main/java/org/apache/skywalking/apm/agent/core/kafka/KafkaServiceManagementServiceClient.java

@@ -106,7 +106,7 @@ public class KafkaServiceManagementServiceClient implements BootService, Runnabl
         if (logger.isDebugEnable()) {
             logger.debug("Heartbeat reporting, instance: {}", ping.getServiceInstance());
         }
-        producer.send(new ProducerRecord<>(ping.getServiceInstance(), Bytes.wrap(ping.toByteArray())));
+        producer.send(new ProducerRecord<>(topic, ping.getServiceInstance(), Bytes.wrap(ping.toByteArray())));
     }
 
     @Override