Bump testcontainers.version from 1.20.3 to 1.20.4 (#650)

Bumps `testcontainers.version` from 1.20.3 to 1.20.4.

Updates `org.testcontainers:postgresql` from 1.20.3 to 1.20.4
- [Release notes](https://github.com/testcontainers/testcontainers-java/releases)
- [Changelog](https://github.com/testcontainers/testcontainers-java/blob/main/CHANGELOG.md)
- [Commits](testcontainers/testcontainers-java@1.20.3...1.20.4)

Updates `org.testcontainers:mockserver` from 1.20.3 to 1.20.4
- [Release notes](https://github.com/testcontainers/testcontainers-java/releases)
- [Changelog](https://github.com/testcontainers/testcontainers-java/blob/main/CHANGELOG.md)
- [Commits](testcontainers/testcontainers-java@1.20.3...1.20.4)

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

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

pom.xml

@@ -37,7 +37,7 @@
     <skip.unit.tests>false</skip.unit.tests>
     <postgresql.version>42.7.4</postgresql.version>
     <hapi.version>6.8.3</hapi.version>
-    <testcontainers.version>1.20.3</testcontainers.version>
+    <testcontainers.version>1.20.4</testcontainers.version>
     <mockserver-client.version>5.15.0</mockserver-client.version>
     <ossindexAnalyzerEnabled>false</ossindexAnalyzerEnabled>
     <spring.cloud-version>2023.0.3</spring.cloud-version>