Bump org.testcontainers:testcontainers-bom to 1.19.6

Bumps [org.testcontainers:testcontainers-bom](https://github.com/testcontainers/testcontainers-java) from 1.19.5 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@1.19.5...1.19.6)

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

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

build.gradle

@@ -67,7 +67,7 @@ ext {
 	springDataVersion = '2022.0.12'
 	springRetryVersion = '2.0.5'
 	springVersion = project.hasProperty('springVersion') ? project.springVersion : '6.0.13'
-	testcontainersVersion = '1.19.5'
+	testcontainersVersion = '1.19.6'
 	zstdJniVersion = '1.5.5-11'
 
 	javaProjects = subprojects - project(':spring-amqp-bom')