build(deps): bump postgresql from 42.5.0 to 42.5.1 in /jans-bom (#3068)

Bumps [postgresql](https://github.com/pgjdbc/pgjdbc) from 42.5.0 to 42.5.1.
- [Release notes](https://github.com/pgjdbc/pgjdbc/releases)
- [Changelog](https://github.com/pgjdbc/pgjdbc/blob/master/CHANGELOG.md)
- [Commits](pgjdbc/pgjdbc@REL42.5.0...REL42.5.1)

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

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