Bump org.postgresql:postgresql from 42.7.8 to 42.7.9

Bumps [org.postgresql:postgresql](https://github.com/pgjdbc/pgjdbc) from 42.7.8 to 42.7.9.
- [Release notes](https://github.com/pgjdbc/pgjdbc/releases)
- [Changelog](https://github.com/pgjdbc/pgjdbc/blob/master/CHANGELOG.md)
- [Commits](pgjdbc/pgjdbc@REL42.7.8...REL42.7.9)

---
updated-dependencies:
- dependency-name: org.postgresql:postgresql
  dependency-version: 42.7.9
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -9,7 +9,7 @@ logging = { module = "org.slf4j:slf4j-api", version = "2.0.17" }
 jackson = { module = "org.veupathdb.lib:jackson-singleton-json", version = "4.0.5" }
 
 db-pool = { module = "com.zaxxer:HikariCP", version = "7.0.2" }
-db-driver = { module = "org.postgresql:postgresql", version = "42.7.8" }
+db-driver = { module = "org.postgresql:postgresql", version = "42.7.9" }
 
 s3-api = { module = "org.veupathdb.lib.s3:s34k", version = "0.11.0" }
 s3-dirs = { module = "org.veupathdb.lib.s3:workspaces-java", version = "5.1.0" }