Update dependency org.hibernate:hibernate-validator to v6 - autoclosed

[mend-for-github-com[bot]]

This PR contains the following updates:

Package	Type	Update	Change
org.hibernate:hibernate-validator (source)	compile	major	5.2.1.Final -> 6.0.23.Final

By merging this PR, the below vulnerabilities will be automatically resolved:

Severity	CVSS Score	CVE
High	7.0	CVE-2017-7536
Medium	5.3	CVE-2020-10693

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