build(deps-dev): bump org.opensearch:opensearch-testcontainers

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:development
  update-type: version-update:semver-patch
...

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

pom.xml

@@ -126,7 +126,7 @@
         <dependency>
             <groupId>org.opensearch</groupId>
             <artifactId>opensearch-testcontainers</artifactId>
-            <version>2.1.1</version>
+            <version>2.1.2</version>
             <scope>test</scope>
         </dependency>
         <dependency>