Bump org.opensearch:opensearch-testcontainers from 2.1.1 to 2.1.2

Bumps [org.opensearch:opensearch-testcontainers](https://github.com/opensearch-project/opensearch-testcontainers) from 2.1.1 to 2.1.2.
- [Release notes](https://github.com/opensearch-project/opensearch-testcontainers/releases)
- [Commits](opensearch-project/opensearch-testcontainers@v2.1.1...v2.1.2)

---
updated-dependencies:
- dependency-name: org.opensearch:opensearch-testcontainers
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

build.gradle

@@ -189,7 +189,7 @@ dependencies {
 
     integrationTestImplementation "org.testcontainers:junit-jupiter:$testcontainersVersion"
     integrationTestImplementation "org.testcontainers:kafka:$testcontainersVersion" // this is not Kafka version
-    integrationTestImplementation "org.opensearch:opensearch-testcontainers:2.1.1"
+    integrationTestImplementation "org.opensearch:opensearch-testcontainers:2.1.2"
     integrationTestImplementation "org.apache.kafka:kafka-clients:$kafkaVersion:test"
     integrationTestImplementation "org.apache.kafka:connect-runtime:${kafkaVersion}"
     integrationTestImplementation "org.apache.kafka:connect-runtime:${kafkaVersion}:test"