build(deps-dev): bump org.postgresql:postgresql in /db-scheduler

Bumps [org.postgresql:postgresql](https://github.com/pgjdbc/pgjdbc) from 42.5.1 to 42.5.5.
- [Release notes](https://github.com/pgjdbc/pgjdbc/releases)
- [Changelog](https://github.com/pgjdbc/pgjdbc/blob/master/CHANGELOG.md)
- [Commits](pgjdbc/pgjdbc@REL42.5.1...REL42.5.5)

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

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

db-scheduler/pom.xml

@@ -23,7 +23,7 @@
         <equals-verifier.version>3.14.2</equals-verifier.version>
         <bytebuddy.version>1.14.5</bytebuddy.version>
         <zonky-pg-embedded.version>2.0.4</zonky-pg-embedded.version>
-        <postgresql.version>42.5.1</postgresql.version>
+        <postgresql.version>42.5.5</postgresql.version>
         <slf4j.version>1.7.36</slf4j.version>
         <test.excludedTags>compatibility,compatibility-cluster</test.excludedTags>
     </properties>