Bump testContainersVersion from 1.18.0 to 1.18.3

Bumps `testContainersVersion` from 1.18.0 to 1.18.3.

Updates `org.testcontainers:testcontainers` from 1.18.0 to 1.18.3
- [Release notes](https://github.com/testcontainers/testcontainers-java/releases)
- [Changelog](https://github.com/testcontainers/testcontainers-java/blob/main/CHANGELOG.md)
- [Commits](testcontainers/testcontainers-java@1.18.0...1.18.3)

Updates `org.testcontainers:junit-jupiter` from 1.18.0 to 1.18.3
- [Release notes](https://github.com/testcontainers/testcontainers-java/releases)
- [Changelog](https://github.com/testcontainers/testcontainers-java/blob/main/CHANGELOG.md)
- [Commits](testcontainers/testcontainers-java@1.18.0...1.18.3)

Updates `org.testcontainers:postgresql` from 1.18.0 to 1.18.3
- [Release notes](https://github.com/testcontainers/testcontainers-java/releases)
- [Changelog](https://github.com/testcontainers/testcontainers-java/blob/main/CHANGELOG.md)
- [Commits](testcontainers/testcontainers-java@1.18.0...1.18.3)

---
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] <[email protected]>

Author: dependabot[bot]

build.gradle.kts

@@ -2,7 +2,7 @@ import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 
 val mockkVersion = "1.13.5"
 val logstashVersion = "7.3"
-val testContainersVersion = "1.18.0"
+val testContainersVersion = "1.18.3"
 val springDocVersion = "2.1.0"
 val tokenValidationVersion = "3.0.11"
 val kotlinVersion = "1.8.21"