Bump hibernate.version from 5.5.5.Final to 5.5.6 in /core

Bumps `hibernate.version` from 5.5.5.Final to 5.5.6.

Updates `hibernate-ehcache` from 5.5.5.Final to 5.5.6
- [Release notes](https://github.com/hibernate/hibernate-orm/releases)
- [Changelog](https://github.com/hibernate/hibernate-orm/blob/main/changelog.txt)
- [Commits](https://github.com/hibernate/hibernate-orm/compare/5.5.5...5.5.6)

Updates `hibernate-jpamodelgen` from 5.5.5.Final to 5.5.6
- [Release notes](https://github.com/hibernate/hibernate-orm/releases)
- [Changelog](https://github.com/hibernate/hibernate-orm/blob/main/changelog.txt)
- [Commits](https://github.com/hibernate/hibernate-orm/compare/5.5.5...5.5.6)

---
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>

Closes #237

Change-Id: I8c3156ca0c9b3718513edc687f1b20cde3a90dc7
diff --git a/core/pom.xml b/core/pom.xml
index ddd9428..fa84189 100644
--- a/core/pom.xml
+++ b/core/pom.xml
@@ -11,7 +11,7 @@
 		<spring.version>5.3.9</spring.version>
 		<jersey.version>1.19.4</jersey.version>
 		<jetty.version>9.4.43.v20210629</jetty.version>
-		<hibernate.version>5.5.5.Final</hibernate.version>
+		<hibernate.version>5.5.6</hibernate.version>
 		<flyway.version>7.13.0</flyway.version>
 		<log4j.version>2.14.1</log4j.version>
 		<krill.version>[0.59.3,)</krill.version>