Bump org.testcontainers:postgresql from 1.19.7 to 1.20.0

Bumps [org.testcontainers:postgresql](https://github.com/testcontainers/testcontainers-java) from 1.19.7 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@1.19.7...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] <support@github.com>

spring-boot-jpa-starter/build.gradle

@@ -10,6 +10,6 @@ dependencies {
         exclude group: 'org.junit.vintage', module: 'junit-vintage-engine'
     }
     testImplementation("org.postgresql:postgresql:42.7.3")
-    testImplementation("org.testcontainers:postgresql:1.19.7")
+    testImplementation("org.testcontainers:postgresql:1.20.0")
     testImplementation 'org.spockframework:spock-spring:2.4-M4-groovy-4.0'
 }