Update elasticsearch.md
Update elasticsearch.md

elasticsearch.yml file requires ":" not "="
jmlong1027/multiscanner,awest1339/multiscanner,awest1339/multiscanner,MITRECND/multiscanner,jmlong1027/multiscanner,awest1339/multiscanner,mitre/multiscanner,jmlong1027/multiscanner,jmlong1027/multiscanner,mitre/multiscanner,awest1339/multiscanner,mitre/multiscanner,MITRECND/multiscanner