Bump org.postgresql:postgresql in the development-dependencies group (#10062)

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


Updates `org.postgresql:postgresql` from 42.7.5 to 42.7.6
- [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/REL42.7.5...REL42.7.6)

---
updated-dependencies:
- dependency-name: org.postgresql:postgresql
  dependency-version: 42.7.6
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: development-dependencies
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

build.gradle

@@ -100,7 +100,7 @@ ext {
     mysqlVersion = '8.3.0'
     oracleVersion = '23.3.0.23.09'
     pahoMqttClientVersion = '1.2.5'
-    postgresVersion = '42.7.5'
+    postgresVersion = '42.7.6'
     protobufVersion = '4.26.1'
     r2dbch2Version = '1.0.0.RELEASE'
     reactorVersion = '2023.0.18'