build(deps): Bump elastic-apm to 4.8.0#304

elastic-observability-automation[bot] wants to merge 2 commits intomainelastic/opbeans-ruby:mainfrom

updatecli_main_8857d47f6d7dfc023fe0e2ce3e9f903403831a0ef0fb67c465966534857685c3elastic/opbeans-ruby:updatecli_main_8857d47f6d7dfc023fe0e2ce3e9f903403831a0ef0fb67c465966534857685c3Copy head branch name to clipboard