Update 8398a7/action-slack action to v3.19.0#548

renovate[bot] merged 1 commit intomainnginx/nginx-plus-go-client:mainfrom

renovate/8398a7-action-slack-3.xnginx/nginx-plus-go-client:renovate/8398a7-action-slack-3.xCopy head branch name to clipboard