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/search/report-alpha.api.md

@@ -359,7 +359,7 @@ export const searchPage: OverridableExtensionDefinition<{
   };
 }>;
 
-// @public @deprecated (undocumented)
+// @alpha @deprecated (undocumented)
 export const searchTranslationRef: TranslationRef<
   'search',
   {

plugins/search/src/alpha.tsx

@@ -288,7 +288,7 @@ export default createFrontendPlugin({
 import { searchTranslationRef as _searchTranslationRef } from './translation';
 
 /**
- * @public
+ * @alpha
  * @deprecated Import from `@backstage/plugin-search` instead.
  */
 export const searchTranslationRef = _searchTranslationRef;