[updatecli] Bump elastic stack version to 8.19.8#1668

elastic-observability-automation[bot] wants to merge 2 commits intomainelastic/apm-agent-rum-js:mainfrom

updatecli_main_9023c022e3293ccde0a87293861e6907e0bdb20f5178403990840a185a8835bfelastic/apm-agent-rum-js:updatecli_main_9023c022e3293ccde0a87293861e6907e0bdb20f5178403990840a185a8835bfCopy head branch name to clipboard