Bump test_versions.testcontainers from 1.20.1 to 1.20.4

Bumps `test_versions.testcontainers` from 1.20.1 to 1.20.4.

Updates `org.testcontainers:mongodb` from 1.20.1 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@1.20.1...1.20.4)

Updates `org.testcontainers:junit-jupiter` from 1.20.1 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@1.20.1...1.20.4)

---
updated-dependencies:
- dependency-name: org.testcontainers:mongodb
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.testcontainers:junit-jupiter
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

gradle/dependencies.gradle

@@ -32,7 +32,7 @@ ext {
             jsonassert    : '1.5.3',
             rest_assured  : '5.5.0',
             commons_codec : '1.17.1',
-            testcontainers: '1.20.1',
+            testcontainers: '1.20.4',
             mockserver    : '5.15.0',
             awaitility    : '4.2.2'
     ]