Updated Feature: Email notification includes helpful guidance when new sites added

When a site that has not joined IREx is listed on a study, the “Participating Sites Added to Study” email now includes helpful text to guide how the site HRPP/IRB can initiate access for their site through the Join IREx page. This is an existing email sent to Reviewing IRBs and SMs if either party adds new sites to a study, but now updated for clearer guidance.