Upgrade to Hibernate Validator 6.0.18.Final

Closes gh-18801

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

@@ -73,7 +73,7 @@
 		<hazelcast.version>3.12.3</hazelcast.version>
 		<hazelcast-hibernate5.version>1.3.2</hazelcast-hibernate5.version>
 		<hibernate.version>5.4.8.Final</hibernate.version>
-		<hibernate-validator.version>6.0.17.Final</hibernate-validator.version>
+		<hibernate-validator.version>6.0.18.Final</hibernate-validator.version>
 		<hikaricp.version>3.4.1</hikaricp.version>
 		<hsqldb.version>2.5.0</hsqldb.version>
 		<htmlunit.version>2.36.0</htmlunit.version>