gradle-batch: bump org.postgresql:postgresql

Bumps [org.postgresql:postgresql](https://github.com/pgjdbc/pgjdbc) from 42.6.0 to 42.7.0.
- [Release notes](https://github.com/pgjdbc/pgjdbc/releases)
- [Changelog](https://github.com/pgjdbc/pgjdbc/blob/master/CHANGELOG.md)
- [Commits](pgjdbc/pgjdbc@REL42.6.0...REL42.7.0)

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

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

samples/web-csr/dressca-backend/batch/build.gradle

@@ -18,7 +18,7 @@ repositories {
 dependencies {
 	implementation 'org.springframework.boot:spring-boot-starter-batch'
 	implementation 'com.h2database:h2:2.2.220'
-	implementation 'org.postgresql:postgresql:42.6.0'
+	implementation 'org.postgresql:postgresql:42.7.0'
 	implementation 'org.mybatis.spring.boot:mybatis-spring-boot-starter:3.0.2'
 	implementation project(':application-core')
 	implementation project(':infrastructure')