Rephrase replicationFactor description about broker version

Signed-off-by: Seonghyeon Cho <[email protected]>

Author: sh-cho

spring-kafka/src/main/java/org/springframework/kafka/retrytopic/RetryTopicConfigurationBuilder.java

@@ -432,8 +432,8 @@ public RetryTopicConfigurationBuilder doNotAutoCreateRetryTopics() {
 	 * Configure the topic creation behavior to auto create topics with the provided
 	 * properties.
 	 * @param numPartitions the number of partitions.
-	 * @param replicationFactor the replication factor (-1 to use the broker default if the
-	 * broker is version 2.4 or later).
+	 * @param replicationFactor the replication factor (-1 to use the broker default. If the
+	 * broker is earlier than version 2.4, an explicit value is required).
 	 * @return the builder.
 	 */
 	public RetryTopicConfigurationBuilder autoCreateTopicsWith(@Nullable Integer numPartitions, @Nullable Short replicationFactor) {
@@ -447,8 +447,8 @@ public RetryTopicConfigurationBuilder autoCreateTopicsWith(@Nullable Integer num
 	 * properties.
 	 * @param shouldCreate true to auto create.
 	 * @param numPartitions the number of partitions.
-	 * @param replicationFactor the replication factor (-1 to use the broker default if the
-	 * broker is version 2.4 or later).
+	 * @param replicationFactor the replication factor (-1 to use the broker default. If the
+	 * broker is earlier than version 2.4, an explicit value is required).
 	 * @return the builder.
 	 */
 	public RetryTopicConfigurationBuilder autoCreateTopics(@Nullable Boolean shouldCreate, @Nullable Integer numPartitions,