uncoment the form verification of attendes

src/app/shared/agenda/new-event/new-event.page.ts

@@ -414,7 +414,7 @@ export class NewEventPage implements OnInit {
         Validators.required
       ]), */
       participantes: new FormControl(this.taskParticipants, [
-        // Validators.required
+         Validators.required
       ]),
       Date: new FormControl(new Date(this.postEvent.StartDate).getTime() < new Date(this.postEvent.EndDate).getTime() ? 'ok' : null, [
         Validators.required