Bump org.testcontainers:postgresql from 1.19.8 to 1.20.0 (#8807)

Bumps [org.testcontainers:postgresql](https://github.com/testcontainers/testcontainers-java) from 1.19.8 to 1.20.0.
- [Release notes](https://github.com/testcontainers/testcontainers-java/releases)
- [Changelog](https://github.com/testcontainers/testcontainers-java/blob/main/CHANGELOG.md)
- [Commits](testcontainers/testcontainers-java@1.19.8...1.20.0)

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

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

buildSrc/build.gradle.kts

@@ -51,7 +51,7 @@ dependencies {
     implementation("org.owasp:dependency-check-gradle:10.0.3")
     implementation("org.sonarsource.scanner.gradle:sonarqube-gradle-plugin:5.1.0.4882")
     implementation("org.springframework.boot:spring-boot-gradle-plugin:3.3.2")
-    implementation("org.testcontainers:postgresql:1.19.8")
+    implementation("org.testcontainers:postgresql:1.20.0")
 }
 
 val gitHook =