Bump testContainersVersion from 1.18.3 to 1.19.0 in /Plan (#3178)

Bumps `testContainersVersion` from 1.18.3 to 1.19.0.

Updates `org.testcontainers:testcontainers` from 1.18.3 to 1.19.0
- [Release notes](https://github.com/testcontainers/testcontainers-java/releases)
- [Changelog](https://github.com/testcontainers/testcontainers-java/blob/main/CHANGELOG.md)
- [Commits](https://github.com/testcontainers/testcontainers-java/compare/1.18.3...1.19.0)

Updates `org.testcontainers:junit-jupiter` from 1.18.3 to 1.19.0
- [Release notes](https://github.com/testcontainers/testcontainers-java/releases)
- [Changelog](https://github.com/testcontainers/testcontainers-java/blob/main/CHANGELOG.md)
- [Commits](https://github.com/testcontainers/testcontainers-java/compare/1.18.3...1.19.0)

Updates `org.testcontainers:nginx` from 1.18.3 to 1.19.0
- [Release notes](https://github.com/testcontainers/testcontainers-java/releases)
- [Changelog](https://github.com/testcontainers/testcontainers-java/blob/main/CHANGELOG.md)
- [Commits](https://github.com/testcontainers/testcontainers-java/compare/1.18.3...1.19.0)

---
updated-dependencies:
- dependency-name: org.testcontainers:testcontainers
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: org.testcontainers:junit-jupiter
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: org.testcontainers:nginx
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Plan/build.gradle

@@ -104,7 +104,7 @@ subprojects {
 
         junitVersion = "5.10.0"
         mockitoVersion = "5.4.0"
-        testContainersVersion = "1.18.3"
+        testContainersVersion = "1.19.0"
         swaggerVersion = "2.2.15"
     }