Bump org.postgresql:postgresql in the development-dependencies group (#10432)

Bumps the development-dependencies group with 1 update: [org.postgresql:postgresql](https://github.com/pgjdbc/pgjdbc).


Updates `org.postgresql:postgresql` 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](pgjdbc/pgjdbc@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
  dependency-group: development-dependencies
...

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Author: dependabot[bot]

build.gradle

@@ -91,7 +91,7 @@ ext {
     mysqlVersion = '9.4.0'
     oracleVersion = '23.9.0.25.07'
     pahoMqttClientVersion = '1.2.5'
-    postgresVersion = '42.7.7'
+    postgresVersion = '42.7.8'
     protobufVersion = '4.32.1'
     r2dbch2Version = '1.0.0.RELEASE'
     reactorVersion = '2025.0.0-M7'