Bump testcontainers from 1.19.4 to 1.19.6 (#60)

Bumps `testcontainers` from 1.19.4 to 1.19.6.

Updates `org.testcontainers:testcontainers` from 1.19.4 to 1.19.6
- [Release notes](https://github.com/testcontainers/testcontainers-java/releases)
- [Changelog](https://github.com/testcontainers/testcontainers-java/blob/main/CHANGELOG.md)
- [Commits](testcontainers/testcontainers-java@1.19.4...1.19.6)

Updates `org.testcontainers:mongodb` from 1.19.4 to 1.19.6
- [Release notes](https://github.com/testcontainers/testcontainers-java/releases)
- [Changelog](https://github.com/testcontainers/testcontainers-java/blob/main/CHANGELOG.md)
- [Commits](testcontainers/testcontainers-java@1.19.4...1.19.6)

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

gradle/libs.versions.toml

@@ -12,7 +12,7 @@ properlty = "1.9.0"
 mongodb = "4.8.2"
 kotest = "5.8.0"
 failsafe = "3.2.4"
-testcontainers = "1.19.4"
+testcontainers = "1.19.6"
 awaitility = "4.2.0"
 guava = "32.1.3-jre"
 micrometer = "1.9.3"