chore(gradle): bump org.postgresql:postgresql from 42.7.1 to 42.7.3

Bumps [org.postgresql:postgresql](https://github.com/pgjdbc/pgjdbc) from 42.7.1 to 42.7.3.
- [Release notes](https://github.com/pgjdbc/pgjdbc/releases)
- [Changelog](https://github.com/pgjdbc/pgjdbc/blob/master/CHANGELOG.md)
- [Commits](pgjdbc/pgjdbc@REL42.7.1...REL42.7.3)

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

Signed-off-by: dependabot[bot] <[email protected]>

gradle/libs.versions.toml

@@ -63,7 +63,7 @@ oshi = "5.8.3"
 pac4j = "5.7.0"
 parquet = "1.14.0"
 picocli = "4.7.6"
-postgresql = "42.7.1"
+postgresql = "42.7.3"
 protobuf = "3.25.3"
 randelshofer = "1.0.0"
 rdblue = "0.1.1"