fix(notification): add aria label and description

Author: r1shabhsharma

src/notification/actionable-notification.component.ts

@@ -83,6 +83,8 @@ export class ActionableNotification extends BaseNotification {
 	}
 
 	@HostBinding("attr.id") notificationID = `notification-${ActionableNotification.notificationCount++}`;
+	@HostBinding("attr.aria-label") notificationLabel = `Notification`;
+	@HostBinding("attr.aria-describedby") notificationDescription = `${this.notificationObj.type} notification`;
 	@HostBinding("class.cds--actionable-notification") notificationClass = true;
 	@HostBinding("class.cds--actionable-notification--toast") get toastVariant() { return this.notificationObj.variant === "toast"; }
 	@HostBinding("class.cds--actionable-notification--error") get isError() { return this.notificationObj.type === "error"; }