chore(alert-banner): update import paths for AlertBannerVariants

Author: blunteshwar

packages/alert-banner/stories/alert-banner.stories.ts

@@ -11,7 +11,7 @@
  */
 
 import { html, TemplateResult } from '@spectrum-web-components/base';
-import { AlertBannerVariants } from '@spectrum-web-components/alert-banner/src/AlertBanner.js';
+import { AlertBannerVariants } from '@spectrum-web-components/alert-banner';
 import { AlertBannerMarkup } from './';
 import { argTypes } from './args.js';
 

packages/alert-banner/stories/index.ts

@@ -12,7 +12,7 @@
 
 import { html, TemplateResult } from '@spectrum-web-components/base';
 
-import { AlertBannerVariants } from '@spectrum-web-components/alert-banner/src/AlertBanner.js';
+import { AlertBannerVariants } from '@spectrum-web-components/alert-banner';
 import '@spectrum-web-components/alert-banner/sp-alert-banner.js';
 import '@spectrum-web-components/button/sp-button.js';