Bump hibernate-core from 5.3.6.Final to 5.3.20.Final in /backend/spring-jpa-mysql#3

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dependabot/maven/backend/spring-jpa-mysql/org.hibernate-hibernate-core-5.3.20.Finalpsnehas/cmpe275_openHome:dependabot/maven/backend/spring-jpa-mysql/org.hibernate-hibernate-core-5.3.20.FinalCopy head branch name to clipboard