[jdbc] Upgrade PostgreSQL JDBC driver to 42.4.4 (#16444)

[jdbc] Upgrade PostgreSQL JDBC driver to 42.4.4 (#16444)

* Bump org.postgresql:postgresql in /bundles/org.openhab.persistence.jdbc

Bumps [org.postgresql:postgresql](https://github.com/pgjdbc/pgjdbc) from 42.4.3 to 42.4.4.
- [Release notes](https://github.com/pgjdbc/pgjdbc/releases)
- [Changelog](https://github.com/pgjdbc/pgjdbc/blob/master/CHANGELOG.md)
- [Commits](https://github.com/pgjdbc/pgjdbc/compare/REL42.4.3...REL42.4.4)

---
updated-dependencies:
- dependency-name: org.postgresql:postgresql
  dependency-type: direct:production
...

Signed-off-by: Jacob Laursen <jacob-github@vindvejr.dk>