Update uui-toast-notification docs (#256)

Author: julczka

packages/uui-toast-notification/lib/uui-toast-notification.element.ts

@@ -120,8 +120,8 @@ export class UUIToastNotificationElement extends LitElement {
   ];
 
   /**
-   * Changes the look of the notification to one of the predefined, symbolic looks. Example set this to danger for errors.
-   * @type {""|"default"|"primary"|"positive"|"warning"|"danger"}
+   * Changes the color of the notification to one of the predefined, symbolic colors. Example: set this to danger to indicate errors.
+   * @type {'' | 'default' | 'positive' | 'warning' | 'danger'}
    * @attr
    * @default ""
    */