Upgrade to Kafka 2.1.1

Closes gh-16144

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

@@ -137,7 +137,7 @@
 		<jtds.version>1.3.1</jtds.version>
 		<junit.version>4.12</junit.version>
 		<junit-jupiter.version>5.3.2</junit-jupiter.version>
-		<kafka.version>2.1.0</kafka.version>
+		<kafka.version>2.1.1</kafka.version>
 		<kotlin.version>1.2.71</kotlin.version>
 		<lettuce.version>5.1.5.RELEASE</lettuce.version>
 		<liquibase.version>3.6.3</liquibase.version>