message: Update SoundsLayer to v9.266
  Closes
diff: @@ -9,6 +9,12 @@ declare class SoundsLayer extends PlaceablesLayer<'AmbientSound', SoundsLayer.La
  */
  livePreview: boolean;
  + /**
  + * A mapping of ambient audio sources which are active within the rendered Scene
  + * @defaultValue `new foundry.utils.Collection()`
  + */
  + sources: foundry.utils.Collection<SoundSource>;
  +
  /**
  * @remarks This is not overridden in foundry but reflects the real behavior.
  */
  @@ -97,9 +103,11 @@ declare class SoundsLayer extends PlaceablesLayer<'AmbientSound', SoundsLayer.La
  protected _onDragLeftCancel(event: PointerEvent): void;
  /**
  - * @deprecated since 0.8.2
  + * Handle PlaylistSound document drop data.
  + * @param event - The drag drop event
  + * @param data - The dropped transfer data.
  */
  - update(options?: { fade?: number }): ReturnType<this['refresh']>;
  + protected _onDropData(event: DragEvent, data: unknown): Promise<void>;
  }
  declare namespace SoundsLayer {
  