chore(deps): bump co.elastic.clients:elasticsearch-java

Bumps [co.elastic.clients:elasticsearch-java](https://github.com/elastic/elasticsearch-java) from 8.14.3 to 8.15.2.
- [Release notes](https://github.com/elastic/elasticsearch-java/releases)
- [Changelog](https://github.com/elastic/elasticsearch-java/blob/main/CHANGELOG.md)
- [Commits](elastic/elasticsearch-java@v8.14.3...v8.15.2)

---
updated-dependencies:
- dependency-name: co.elastic.clients:elasticsearch-java
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

pom.xml

@@ -28,7 +28,7 @@
         <opentelemetry-semconv.version>1.25.0-alpha</opentelemetry-semconv.version>
         <opentelemetry-contrib.version>1.37.0-alpha</opentelemetry-contrib.version>
         <useBeta>true</useBeta>
-        <elasticstack.version>8.14.3</elasticstack.version>
+        <elasticstack.version>8.15.2</elasticstack.version>
         <error-prone.version>2.32.0</error-prone.version>
     </properties>
     <name>OpenTelemetry Plugin</name>