Bump the gradle group with 1 update

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


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:postgresql
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: gradle
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

build.gradle.kts

@@ -14,7 +14,7 @@ val kotliqueryVersion = "1.9.0"
 val postgresVersion = "42.7.2"
 
 // Test
-val testcontainersVersion = "1.19.5"
+val testcontainersVersion = "1.19.6"
 val mockkVersion = "1.13.9"
 val schemaValidatorVersion = "1.3.3"
 val awaitilityVersion = "4.2.0"