Fix ES download URL
Fix ES download URL

Graylog2/omnibus-graylog2,Graylog2/omnibus-graylog2,Graylog2/omnibus-graylog2,radykal-com/omnibus-graylog2,radykal-com/omnibus-graylog2,Graylog2/omnibus-graylog2,radykal-com/omnibus-graylog2,radykal-com/omnibus-graylog2