Update dependency org.elasticsearch:elasticsearch to v8

Author: renovate[bot]

Diff for: build.gradle

@@ -278,7 +278,7 @@ dependencies {
   implementation group: 'org.apache.tomcat.embed', name: 'tomcat-embed-core', version: '10.1.10'
   implementation group: 'org.apache.tomcat.embed', name: 'tomcat-embed-websocket', version: '10.1.10'
   implementation group: 'com.github.hmcts', name: 'service-auth-provider-java-client', version: '5.1.0'
-  implementation group: 'org.elasticsearch', name: 'elasticsearch', version: '7.17.11'
+  implementation group: 'org.elasticsearch', name: 'elasticsearch', version: '8.8.2'
   implementation group: 'org.projectlombok', name: 'lombok', version: versions.lombok
   implementation group: 'org.springdoc', name: 'springdoc-openapi-starter-webmvc-ui', version: '2.1.0'
   implementation group: 'org.springframework.boot', name: 'spring-boot-starter-web'