Bump org.postgresql:postgresql from 42.7.7 to 42.7.8

Bumps [org.postgresql:postgresql](https://github.com/pgjdbc/pgjdbc) from 42.7.7 to 42.7.8.
- [Release notes](https://github.com/pgjdbc/pgjdbc/releases)
- [Changelog](https://github.com/pgjdbc/pgjdbc/blob/master/CHANGELOG.md)
- [Commits](https://github.com/pgjdbc/pgjdbc/compare/REL42.7.7...REL42.7.8)

---
updated-dependencies:
- dependency-name: org.postgresql:postgresql
  dependency-version: 42.7.8
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

pom.xml

@@ -24,7 +24,7 @@
         <spring-security.version>6.5.5</spring-security.version> <!-- sync with version used by spring-boot-->
         <hibernate.version>6.4.10.Final</hibernate.version>
         <hibernate-validator.version>8.0.3.Final</hibernate-validator.version>
-        <postgresql.driver.version>42.7.7</postgresql.driver.version>
+        <postgresql.driver.version>42.7.8</postgresql.driver.version>
         <flyway.version>10.22.0</flyway.version>
         <solr.client.version>8.11.4</solr.client.version>