docs: add rc badge to react aria autocomplete (#9289)

Author: yihuiliao

packages/dev/s2-docs/pages/react-aria/Autocomplete.mdx

@@ -6,6 +6,7 @@ import vanillaDocs from 'docs:vanilla-starter/CommandPalette';
 import '../../tailwind/tailwind.css';
 
 export const tags = ['combobox', 'typeahead', 'input'];
+export const version = 'rc';
 export const relatedPages = [{'title': 'useAutocomplete', 'url': 'https://react-spectrum.adobe.com/react-aria/useAutocomplete.html'}];
 export const description = 'Allows users to search or filter a list of suggestions.';