fix some errors as per PR comments

Author: NathanQingyangXu

spring-kafka-docs/src/main/antora/modules/ROOT/pages/kafka/receiving-messages/sequencing.adoc

@@ -1,5 +1,5 @@
 [[sequencing]]
-= Starting `@KafkaListener`s in Sequence
+= Starting `@KafkaListener`+++s+++ in Sequence
 
 A common use case is to start a listener after another listener has consumed all the records in a topic.
 For example, you may want to load the contents of one or more compacted topics into memory before processing records from other topics.

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

@@ -5,9 +5,9 @@ Retry topics and DLT are named by suffixing the main topic with a provided or de
 
 Examples:
 
-"my-topic" +++->+++ "my-topic-retry-0", "my-topic-retry-1", ..., "my-topic-dlt"
+"my-topic" -> "my-topic-retry-0", "my-topic-retry-1", ..., "my-topic-dlt"
 
-"my-other-topic" +++->+++ "my-topic-myRetrySuffix-1000", "my-topic-myRetrySuffix-2000", ..., "my-topic-myDltSuffix"
+"my-other-topic" -> "my-topic-myRetrySuffix-1000", "my-topic-myRetrySuffix-2000", ..., "my-topic-myDltSuffix"
 
 NOTE: The default behavior is to create separate retry topics for each attempt, appended with an index value: retry-0, retry-1, ..., retry-n.
 Therefore, by default the number of retry topics is the configured `maxAttempts` minus 1.