update API per comment

Author: dmceachernmsft

packages/communication-react/review/beta/communication-react.api.md

@@ -4190,7 +4190,7 @@ export const NotificationStack: (props: NotificationStackProps) => JSX.Element;
 
 // @public
 export interface NotificationStackOptions {
-    showCallNotifications?: 'hidden' | 'visible';
+    hideAllNotifications?: boolean;
 }
 
 // @public

packages/communication-react/review/stable/communication-react.api.md

@@ -3700,7 +3700,7 @@ export const NotificationStack: (props: NotificationStackProps) => JSX.Element;
 
 // @public
 export interface NotificationStackOptions {
-    showCallNotifications?: 'hidden' | 'visible';
+    hideAllNotifications?: boolean;
 }
 
 // @public

packages/react-composites/src/composites/CallComposite/CallComposite.tsx

@@ -159,7 +159,7 @@ export interface NotificationStackOptions {
    * Whether to show the notifications in the composite. useful
    * for hiding the notifications in the composite to replace with your own custom notifications.
    */
-  showCallNotifications?: 'hidden' | 'visible';
+  hideAllNotifications?: boolean;
 }
 
 /**

packages/react-composites/src/composites/CallComposite/components/CallArrangement.tsx

@@ -544,7 +544,7 @@ export const CallArrangement = (props: CallArrangementProps): JSX.Element => {
             <Stack.Item style={callCompositeContainerCSS}>
               <Stack.Item styles={callGalleryStyles} grow>
                 <Stack verticalFill styles={galleryContainerStyles}>
-                  {props.notificationOptions?.showCallNotifications !== 'hidden' && (
+                  {!props.notificationOptions?.hideAllNotifications && (
                     <Stack.Item styles={notificationsContainerStyles}>
                       {
                         /* @conditional-compile-remove(breakout-rooms) */