Clarify why the reindex job is needed
Clarify why the reindex job is needed

Referencing our findings from
https://trello.com/c/n75DpJ4X/2707-investigate-options-to-stop-us-having-to-reindex-out-of-hours-when-changing-a-specialist-finder-timeboxed-to-1-to-2-days.

alphagov/specialist-publisher,alphagov/specialist-publisher,alphagov/specialist-publisher