Update prompt title.

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

@@ -385,7 +385,7 @@ script(type="text/ng-template", id="trackChangesUpgradeModalTemplate")
 			data-dismiss="modal"
 			ng-click="cancel()"
 		) ×
-		h3 Track Changes
+		h3 Upgrade to Track Changes
 	.modal-body
 		.teaser-video-container
 			video.teaser-video(autoplay, loop)