Bump hibernate.version from 5.6.7.Final to 5.6.8.Final in /core

Bumps `hibernate.version` from 5.6.7.Final to 5.6.8.Final.

Updates `hibernate-ehcache` from 5.6.7.Final to 5.6.8.Final
- [Release notes](https://github.com/hibernate/hibernate-orm/releases)
- [Changelog](https://github.com/hibernate/hibernate-orm/blob/5.6.8/changelog.txt)
- [Commits](https://github.com/hibernate/hibernate-orm/compare/5.6.7...5.6.8)

Updates `hibernate-jpamodelgen` from 5.6.7.Final to 5.6.8.Final
- [Release notes](https://github.com/hibernate/hibernate-orm/releases)
- [Changelog](https://github.com/hibernate/hibernate-orm/blob/5.6.8/changelog.txt)
- [Commits](https://github.com/hibernate/hibernate-orm/compare/5.6.7...5.6.8)

---
updated-dependencies:
- dependency-name: org.hibernate:hibernate-ehcache
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.hibernate:hibernate-jpamodelgen
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
diff --git a/core/pom.xml b/core/pom.xml
index 856c67c..a8a81fa 100644
--- a/core/pom.xml
+++ b/core/pom.xml
@@ -11,7 +11,7 @@
 		<spring.version>5.3.19</spring.version>
 		<jersey.version>1.19.4</jersey.version>
 		<jetty.version>9.4.46.v20220331</jetty.version>
-		<hibernate.version>5.6.7.Final</hibernate.version>
+		<hibernate.version>5.6.8.Final</hibernate.version>
 		<flyway.version>8.5.5</flyway.version>
 		<log4j.version>[2.17.1,)</log4j.version>
 		<krill.version>[0.60.4,)</krill.version>