Bump org.testcontainers:kafka in the dependencies group (#183)

Bumps the dependencies group with 1 update: [org.testcontainers:kafka](https://github.com/testcontainers/testcontainers-java).


Updates `org.testcontainers:kafka` from 1.19.8 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@1.19.8...1.20.0)

---
updated-dependencies:
- dependency-name: org.testcontainers:kafka
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: dependencies
...

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

Author: dependabot[bot]

build.gradle.kts

@@ -12,7 +12,7 @@ val logstashEncoderVersion = "7.4"
 val prometheusVersion = "0.16.0"
 val smCommonVersion = "2.0.8"
 val mockkVersion = "1.13.12"
-val testContainerKafkaVersion = "1.19.8"
+val testContainerKafkaVersion = "1.20.0"
 val kotlinVersion = "2.0.0"
 val jaxbRuntimeVersion = "2.4.0-b180830.0438"
 val jaxbApiVersion = "2.4.0-b180830.0359"