build(deps): bump testcontainers from 1.19.3 to 1.19.8

Bumps `testcontainers` from 1.19.3 to 1.19.8.

Updates `org.testcontainers:vault` from 1.19.3 to 1.19.8
- [Release notes](https://github.com/testcontainers/testcontainers-java/releases)
- [Changelog](https://github.com/testcontainers/testcontainers-java/blob/main/CHANGELOG.md)
- [Commits](testcontainers/testcontainers-java@1.19.3...1.19.8)

Updates `org.testcontainers:junit-jupiter` from 1.19.3 to 1.19.8
- [Release notes](https://github.com/testcontainers/testcontainers-java/releases)
- [Changelog](https://github.com/testcontainers/testcontainers-java/blob/main/CHANGELOG.md)
- [Commits](testcontainers/testcontainers-java@1.19.3...1.19.8)

Updates `org.testcontainers:postgresql` from 1.19.3 to 1.19.8
- [Release notes](https://github.com/testcontainers/testcontainers-java/releases)
- [Changelog](https://github.com/testcontainers/testcontainers-java/blob/main/CHANGELOG.md)
- [Commits](testcontainers/testcontainers-java@1.19.3...1.19.8)

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

Signed-off-by: dependabot[bot] <support@github.com>

gradle/libs.versions.toml

@@ -34,7 +34,7 @@ rsApi = "3.1.0"
 swagger-annotations-jakarta = "2.2.20"
 titanium = "1.3.3"
 kafkaClients = "3.6.1"
-testcontainers = "1.19.3"
+testcontainers = "1.19.8"
 tink = "1.12.0"