[7.x] [Alerting] change server log action type .log to .server-log in README (#64124)#64393

pmuellr merged 1 commit intoelastic:7.xelastic/kibana:7.xfrom

pmuellr:backport/7.x/pr-64124pmuellr/kibana:backport/7.x/pr-64124Copy head branch name to clipboard