Addressing PR review

Signed-off-by: chickenchickenlove <[email protected]>

Author: chickenchickenlove

spring-kafka-docs/src/main/antora/modules/ROOT/pages/kafka/receiving-messages/class-level-kafkalistener.adoc

@@ -64,7 +64,7 @@ void listen(Object in, @Header(KafkaHeaders.RECORD_METADATA) ConsumerRecordMetad
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 Also, this won't work as well.
-The `payload` value will be injected as the `topic`.
+The `topic` is resolved to the `payload`.
 
 [source, java]
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@@ -75,7 +75,7 @@ public void listenDefault(String payload, @Header(KafkaHeaders.RECEIVED_TOPIC) S
 }
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-If you need discrete custom headers in a default method, use this:
+If there are use cases in which discrete custom headers are required in a default method, use this:
 [source, java]
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 @KafkaHandler(isDefault = true)