Bump org.elasticsearch.client:elasticsearch-rest-client

Bumps [org.elasticsearch.client:elasticsearch-rest-client](https://github.com/elastic/elasticsearch) from 9.1.2 to 9.1.4.
- [Release notes](https://github.com/elastic/elasticsearch/releases)
- [Changelog](https://github.com/elastic/elasticsearch/blob/main/CHANGELOG.md)
- [Commits](elastic/elasticsearch@v9.1.2...v9.1.4)

---
updated-dependencies:
- dependency-name: org.elasticsearch.client:elasticsearch-rest-client
  dependency-version: 9.1.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

modules/elasticsearch/build.gradle

@@ -6,7 +6,7 @@ dependencies {
     testRuntimeOnly 'org.junit.platform:junit-platform-launcher:1.11.0'
 
     testImplementation 'org.junit.jupiter:junit-jupiter:5.13.4'
-    testImplementation "org.elasticsearch.client:elasticsearch-rest-client:9.1.2"
+    testImplementation "org.elasticsearch.client:elasticsearch-rest-client:9.1.4"
     testImplementation "org.elasticsearch.client:transport:7.17.29"
     testImplementation 'org.assertj:assertj-core:3.27.4'
 }