Bump org.postgresql:postgresql from 42.3.8 to 42.3.9 (#4784)

Bumps [org.postgresql:postgresql](https://github.com/pgjdbc/pgjdbc) from 42.3.8 to 42.3.9.
- [Release notes](https://github.com/pgjdbc/pgjdbc/releases)
- [Changelog](https://github.com/pgjdbc/pgjdbc/blob/master/CHANGELOG.md)
- [Commits](pgjdbc/pgjdbc@REL42.3.8...REL42.3.9)

---
updated-dependencies:
- dependency-name: org.postgresql:postgresql
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -59,7 +59,7 @@ mongo = "4.6.1"
 netty = "4.1.107.Final"
 newrelic-api = "5.14.0"
 okhttp = "4.11.0"
-postgre = "42.3.8"
+postgre = "42.3.9"
 prometheus = "0.15.0"
 reactor = "2020.0.41"
 rest-assured = "5.3.2"