Upgrade to Hibernate 6.4.

Fixes GH-3258.

Author: odrotbohm

pom.xml

@@ -30,7 +30,7 @@
 		<antlr>4.10.1</antlr> <!-- align with Hibernate's parser -->
 		<eclipselink>3.0.3</eclipselink>
 		<eclipselink-next>4.0.2</eclipselink-next>
-		<hibernate>6.3.1.Final</hibernate>
+		<hibernate>6.4.0.Final</hibernate>
 		<hibernate-64-next-snapshots>6.4.1-SNAPSHOT</hibernate-64-next-snapshots>
 		<hsqldb>2.7.1</hsqldb>
 		<h2>2.2.220</h2>