Bump org.postgresql:postgresql from 42.6.0 to 42.7.1

Bumps [org.postgresql:postgresql](https://github.com/pgjdbc/pgjdbc) from 42.6.0 to 42.7.1.
- [Release notes](https://github.com/pgjdbc/pgjdbc/releases)
- [Changelog](https://github.com/pgjdbc/pgjdbc/blob/master/CHANGELOG.md)
- [Commits](pgjdbc/pgjdbc@REL42.6.0...REL42.7.1)

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

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

build.gradle.kts

@@ -14,7 +14,7 @@ val slf4jVersion = "1.7.36"
 val logbackVersion = "1.2.13"
 val javaxVersion = "2.1.1"
 val logstashEncoderVersion = "7.0.1"
-val postgresVersion = "42.6.0"
+val postgresVersion = "42.7.1"
 val hikariVersion = "5.1.0"
 val flywayVersion = "7.5.2"
 val vaultJdbcVersion = "1.3.9"