chore(deps): bump testcontainersVersion from 1.20.3 to 1.20.4

Bumps `testcontainersVersion` from 1.20.3 to 1.20.4.

Updates `org.testcontainers:junit-jupiter` 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:kafka` 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:testcontainers` 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:junit-jupiter
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.testcontainers:kafka
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.testcontainers:testcontainers
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

build.gradle.kts

@@ -75,7 +75,7 @@ val mockitoVersion = "5.14.1"
 val servletVersion = "4.0.1"
 val slf4japiVersion = "1.7.36"
 val spotbugsAnnotationsVersion = "4.8.6"
-val testcontainersVersion = "1.20.3"
+val testcontainersVersion = "1.20.4"
 val assertjVersion = "3.25.3"
 val awaitilityVersion = "4.2.2"