Bump testcontainers.version from 1.21.3 to 1.21.4 (#4522)

Bumps `testcontainers.version` from 1.21.3 to 1.21.4.

Updates `org.testcontainers:mockserver` from 1.21.3 to 1.21.4
- [Release notes](https://github.com/testcontainers/testcontainers-java/releases)
- [Changelog](https://github.com/testcontainers/testcontainers-java/blob/main/CHANGELOG.md)
- [Commits](testcontainers/testcontainers-java@1.21.3...1.21.4)

Updates `org.testcontainers:junit-jupiter` from 1.21.3 to 1.21.4
- [Release notes](https://github.com/testcontainers/testcontainers-java/releases)
- [Changelog](https://github.com/testcontainers/testcontainers-java/blob/main/CHANGELOG.md)
- [Commits](testcontainers/testcontainers-java@1.21.3...1.21.4)

---
updated-dependencies:
- dependency-name: org.testcontainers:mockserver
  dependency-version: 1.21.4
  dependency-type: direct:development
  update-type: version-update:semver-patch
- dependency-name: org.testcontainers:junit-jupiter
  dependency-version: 1.21.4
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

pom.xml

@@ -82,7 +82,7 @@
 		<bintray.package>netflix</bintray.package>
 		<spring-cloud-commons.version>5.0.1-SNAPSHOT</spring-cloud-commons.version>
 		<spring-cloud-config.version>5.0.1-SNAPSHOT</spring-cloud-config.version>
-		<testcontainers.version>1.21.3</testcontainers.version>
+		<testcontainers.version>1.21.4</testcontainers.version>
 		<mockserverclient.version>5.15.0</mockserverclient.version>
 
 		<!-- Sonar -->