Please add note to install Guide to edit where ES lives

There is no note for the graph install process to change where ES is running if not running on localhost:9200.
To avoid other users making this mistake please add the note.

The file I needed to edit was /opt/kibana/installedPlugins/graph/public/graphClientWorkspace.js

I don't think the editing of that file should be connected to the system suddenly working.

While there is a reference to 9200 in that file it is not used and the graph requests are all proxied via the Kibana server and its configured choice of elasticsearch server.

Ah ok, thanks! I had only changed that config before a restart of one of the kibana/elastic instances. Must have just been the restart that fixed it.