build(deps): bump elasticsearch from 8.18.2 to 9.1.4 in /skywalking#846

dependabot[bot] wants to merge 1 commit intomainenvoyproxy/examples:mainfrom

dependabot/docker/skywalking/elasticsearch-9.1.4envoyproxy/examples:dependabot/docker/skywalking/elasticsearch-9.1.4Copy head branch name to clipboard