Bump org.opensearch.client:opensearch-java from 2.17.0 to 2.18.0 (#911)

Bumps [org.opensearch.client:opensearch-java](https://github.com/opensearch-project/opensearch-java) from 2.17.0 to 2.18.0.
- [Release notes](https://github.com/opensearch-project/opensearch-java/releases)
- [Changelog](https://github.com/opensearch-project/opensearch-java/blob/v2.18.0/CHANGELOG.md)
- [Commits](opensearch-project/opensearch-java@v2.17.0...v2.18.0)

---
updated-dependencies:
- dependency-name: org.opensearch.client:opensearch-java
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

pom.xml

@@ -432,7 +432,7 @@ under the License.
 
     <elasticsearch.version>8.16.0</elasticsearch.version>
     <opensearch.version>2.18.0</opensearch.version>
-    <opensearch-java.version>2.17.0</opensearch-java.version>
+    <opensearch-java.version>2.18.0</opensearch-java.version>
 
     <log4j2.version>2.22.0</log4j2.version>
     <disruptor.version>3.4.4</disruptor.version>