Bump hibernate-validator from 6.1.3.Final to 6.1.5.Final

Bumps [hibernate-validator](https://github.com/hibernate/hibernate-validator) from 6.1.3.Final to 6.1.5.Final.
- [Release notes](https://github.com/hibernate/hibernate-validator/releases)
- [Changelog](https://github.com/hibernate/hibernate-validator/blob/6.1.5.Final/changelog.txt)
- [Commits](hibernate/hibernate-validator@6.1.3.Final...6.1.5.Final)

---
updated-dependencies:
- dependency-name: org.hibernate.validator:hibernate-validator
  dependency-type: direct:production
...

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

pom.xml

@@ -52,7 +52,7 @@
         <dellroad-stuff.version>2.4.2</dellroad-stuff.version>
         <findbugs.version>3.0.2</findbugs.version>
         <h2.version>1.4.196</h2.version>
-        <hibernate.validator.version>6.1.3.Final</hibernate.validator.version>
+        <hibernate.validator.version>6.1.5.Final</hibernate.validator.version>
         <hibernate.version>5.4.12.Final</hibernate.version>
         <javax.el.version>3.0.1-b11</javax.el.version>
         <javax.persistence.version>2.2</javax.persistence.version>