Bump org.postgresql:postgresql from 42.7.3 to 42.7.4

Bumps [org.postgresql:postgresql](https://github.com/pgjdbc/pgjdbc) from 42.7.3 to 42.7.4.
- [Release notes](https://github.com/pgjdbc/pgjdbc/releases)
- [Changelog](https://github.com/pgjdbc/pgjdbc/blob/master/CHANGELOG.md)
- [Commits](pgjdbc/pgjdbc@REL42.7.3...REL42.7.4)

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

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

spring-boot-jpa-starter/build.gradle

@@ -8,6 +8,6 @@ dependencies {
     api project(":spring-boot-core-starter")
 
     testImplementation 'org.springframework.boot:spring-boot-starter-data-jpa'
-    testImplementation("org.postgresql:postgresql:42.7.3")
+    testImplementation("org.postgresql:postgresql:42.7.4")
     testImplementation("org.testcontainers:postgresql:1.20.1")
 }