Upgrade to Spring Batch 4.2.1

Closes gh-19073

Author: philwebb

spring-boot-project/spring-boot-dependencies/pom.xml

@@ -186,7 +186,7 @@
 		<snakeyaml.version>1.25</snakeyaml.version>
 		<solr.version>8.2.0</solr.version>
 		<spring-amqp.version>2.2.2.RELEASE</spring-amqp.version>
-		<spring-batch.version>4.2.0.RELEASE</spring-batch.version>
+		<spring-batch.version>4.2.1.RELEASE</spring-batch.version>
 		<spring-cloud-connectors.version>2.0.7.RELEASE</spring-cloud-connectors.version>
 		<spring-data-releasetrain.version>Moore-SR3</spring-data-releasetrain.version>
 		<spring-framework.version>5.2.2.RELEASE</spring-framework.version>