Fix alpha entry point translation ref re-exports to use @alpha instead of @public

Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>
Made-with: Cursor

plugins/notifications/report-alpha.api.md

@@ -120,7 +120,7 @@ const _default: OverridableFrontendPlugin<
 >;
 export default _default;
 
-// @public @deprecated (undocumented)
+// @alpha @deprecated (undocumented)
 export const notificationsTranslationRef: TranslationRef<
   'plugin.notifications',
   {

plugins/notifications/src/alpha.tsx

@@ -59,7 +59,7 @@ export default createFrontendPlugin({
 import { notificationsTranslationRef as _notificationsTranslationRef } from './translation';
 
 /**
- * @public
+ * @alpha
  * @deprecated Import from `@backstage/plugin-notifications` instead.
  */
 export const notificationsTranslationRef = _notificationsTranslationRef;