Minor copy change Registered -> Accepted invite

services/web/app/views/subscriptions/group_admin.pug

@@ -32,7 +32,7 @@ block content
 										.col-md-5
 											span.header #{translate("name")}
 										.col-md-2
-											span.header #{translate("registered")}
+											span.header #{translate("accepted_invite")}
 								li.container-fluid(
 									ng-repeat="user in users | orderBy:'email':true",
 									ng-controller="SubscriptionGroupMemberListItemController"