Bump testContainersVersion from 1.19.5 to 1.19.6

Bumps `testContainersVersion` from 1.19.5 to 1.19.6.

Updates `org.testcontainers:testcontainers` 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)

Updates `org.testcontainers:junit-jupiter` 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)

Updates `org.testcontainers:postgresql` 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
  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>

build.gradle.kts

@@ -4,7 +4,7 @@ val ktorVersion = "2.3.8"
 val jacksonVersion = "2.14.1"
 val mockkVersion = "1.13.9"
 val kotestVersion = "5.8.0"
-val testContainersVersion = "1.19.5"
+val testContainersVersion = "1.19.6"
 
 
 plugins {