Bump org.postgresql:postgresql from 42.5.3 to 42.6.0

Bumps [org.postgresql:postgresql](https://github.com/pgjdbc/pgjdbc) from 42.5.3 to 42.6.0.
- [Release notes](https://github.com/pgjdbc/pgjdbc/releases)
- [Changelog](https://github.com/pgjdbc/pgjdbc/blob/master/CHANGELOG.md)
- [Commits](pgjdbc/pgjdbc@REL42.5.3...REL42.6.0)

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

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

pom.xml

@@ -73,7 +73,7 @@
         <version.maven-plugin-tools>3.9.0</version.maven-plugin-tools>
         <version.mockito>5.6.0</version.mockito>
         <version.nullaway>0.10.15</version.nullaway>
-        <version.postgresql>42.5.3</version.postgresql>
+        <version.postgresql>42.6.0</version.postgresql>
         <version.surefire>3.1.2</version.surefire>
     </properties>