Fix the elasticsearch advanced search syntax link and edition details

Merged Nick Thomas requested to merge (removed):fix-advanced-search-syntax-link into master

What does this MR do?

Fix a dead link and specify in the linked-to documentation that advanced search syntax is EES, not EEP.

Are there points in the code the reviewer needs to double check?


Why was this MR needed?

Dead link and inaccurate information in a high-profile 9.2 feature

Edited by Nick Thomas