deps: bump org.testcontainers:postgresql from 1.19.8 to 1.20.2

Bumps [org.testcontainers:postgresql](https://github.com/testcontainers/testcontainers-java) from 1.19.8 to 1.20.2.
- [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...1.20.2)

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

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

pom.xml

@@ -81,7 +81,7 @@
         <junit-platform-commons.version>1.4.0</junit-platform-commons.version>
         <junit-platform-launcher.version>1.4.0</junit-platform-launcher.version>
         <junit-jupiter.version>5.11.0</junit-jupiter.version>
-        <testcontainers.version>1.19.8</testcontainers.version>
+        <testcontainers.version>1.20.2</testcontainers.version>
         <instancio-junit.version>3.0.1</instancio-junit.version>
         <rest-assured.version>5.4.0</rest-assured.version>
         <json-schema-validator.version>5.4.0</json-schema-validator.version>