change free trial from track changes to real-time-track-changes, conflict with old event

services/web/app/views/project/editor/review-panel.pug

@@ -417,7 +417,7 @@ script(type="text/ng-template", id="trackChangesUpgradeModalTemplate")
 		.row.text-center(ng-controller="FreeTrialModalController")
 			a.btn.btn-success(
 				href
-				ng-click="startFreeTrial('track-changes')"
+				ng-click="startFreeTrial('real-time-track-changes')"
 				ng-show="project.owner._id == user.id"
 			) Try it for free
 			p(ng-show="project.owner._id != user.id"): strong Please ask the project owner to upgrade to use track changes