Upgrade to Hibernate 5.4.15.Final

Closes gh-21339

Author: snicoll

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

@@ -72,7 +72,7 @@
 		<hamcrest.version>2.1</hamcrest.version>
 		<hazelcast.version>3.12.7</hazelcast.version>
 		<hazelcast-hibernate5.version>1.3.2</hazelcast-hibernate5.version>
-		<hibernate.version>5.4.14.Final</hibernate.version>
+		<hibernate.version>5.4.15.Final</hibernate.version>
 		<hibernate-validator.version>6.0.19.Final</hibernate-validator.version>
 		<hikaricp.version>3.4.3</hikaricp.version>
 		<hsqldb.version>2.5.0</hsqldb.version>