add toast

Author: RChandler234

src/frontend/src/pages/ChangeRequestDetailPage/ChangeRequestActionMenu.tsx

@@ -53,6 +53,7 @@ const ChangeRequestActionMenu: React.FC<ChangeRequestActionMenuProps> = ({
     } else {
       try {
         await requestCRReview({ userIds: reviewerIds });
+        toast.success('Review Successfully Requested!');
       } catch (e) {
         if (e instanceof Error) {
           toast.error(e.message);