fix doc.

Author: Wzy19930507

spring-kafka-docs/src/main/antora/modules/ROOT/pages/retrytopic/topic-naming.adoc

@@ -133,6 +133,8 @@ When using the strategy that work with the number of retry topics equal to the c
 * ...
 * -retry-16000-224
 
+If multiple topics are required, then that can be done using the following configuration.
+
 [source, java]
 ----
 @RetryableTopic(attempts = 230,

spring-kafka-docs/src/main/antora/modules/ROOT/pages/whats-new.adoc

@@ -49,5 +49,5 @@ See xref:kafka/annotation-error-handling.adoc#after-rollback[After-rollback Proc
 
 [[x32-retry-topic]]
 === Change @RetryableTopic SameIntervalTopicReuseStrategy default value
-Change `@RetryableTopic` property SameIntervalTopicReuseStrategy default value to SINGLE_TOPIC.
+Change `@RetryableTopic` property `SameIntervalTopicReuseStrategy` default value to `SINGLE_TOPIC`.
 See xref:retrytopic/topic-naming.adoc#single-topic-maxinterval-delay[Single Topic for maxInterval Exponential Delay].