message: docs(modal): add missing section in Api Reference
  Added title `ModalContainerComponent`
diff: @@ -181,6 +181,11 @@ export const demoComponentContent: ContentSection[] = [
  anchor: 'modal-backdrop-component',
  outlet: NgApiDocComponent
  },
  + {
  + title: 'ModalContainerComponent',
  + anchor: 'modal-container',
  + outlet: NgApiDocComponent
  + },
  {
  title: 'BsModalService',
  anchor: 'bs-modal-service',
  