Bump hibernate-core from 5.6.5.Final to 5.6.6.Final

Bumps [hibernate-core](https://github.com/hibernate/hibernate-orm) from 5.6.5.Final to 5.6.6.Final.
- [Release notes](https://github.com/hibernate/hibernate-orm/releases)
- [Changelog](https://github.com/hibernate/hibernate-orm/blob/5.6.6/changelog.txt)
- [Commits](https://github.com/hibernate/hibernate-orm/compare/5.6.5...5.6.6)

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

Signed-off-by: dependabot[bot] <support@github.com>

build.gradle

@@ -33,7 +33,7 @@ dependencies {
     implementation 'io.activej:activej-launchers-http:5.1.1'
     implementation 'org.hsqldb:hsqldb:2.6.1'
     implementation 'org.postgresql:postgresql:42.3.3'
-    implementation 'org.hibernate:hibernate-core:5.6.5.Final'
+    implementation 'org.hibernate:hibernate-core:5.6.6.Final'
     implementation 'org.hibernate:hibernate-hikaricp:5.6.6.Final'
     implementation 'com.zaxxer:HikariCP:5.0.1'
     implementation 'org.springframework.security:spring-security-crypto:5.6.2'