[FLINK-29466][Connector/JDBC] Bump postgresql in /flink-connectors/flink-connector-jdbc
[FLINK-29466][Connector/JDBC] Bump postgresql in /flink-connectors/flink-connector-jdbc

Bumps [postgresql](https://github.com/pgjdbc/pgjdbc) from 42.3.3 to 42.5.0.
- [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/REL42.3.3...REL42.5.0)

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

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>

apache/flink,wwjiang007/flink,wwjiang007/flink,apache/flink,apache/flink,apache/flink,wwjiang007/flink,lincoln-lil/flink,wwjiang007/flink,apache/flink,lincoln-lil/flink,lincoln-lil/flink,lincoln-lil/flink,wwjiang007/flink,lincoln-lil/flink,apache/flink,wwjiang007/flink,apache/flink,lincoln-lil/flink,lincoln-lil/flink,wwjiang007/flink