docs: fix CORS issue and broken example link (#2727)

### Change Type

- [x] `documentation` — Changes to the documentation only[^2]

### Release Notes

- Fixes docs CORS issue.

apps/docs/app/layout.tsx

@@ -16,7 +16,7 @@ const FACEBOOK_CARD = 'social-og.png'
 const THEME_COLOR = '#FFFFFF'
 
 export const metadata: Metadata = {
-	metadataBase: new URL('https://www.tldraw.dev'),
+	metadataBase: new URL('https://tldraw.dev'),
 	title: {
 		default: TITLE,
 		template: `%s • ${TITLE}`,

apps/docs/components/Search.tsx

@@ -10,7 +10,7 @@ import Autocomplete, { DropdownOption } from './Autocomplete'
 const HOST_URL =
 	process.env.NODE_ENV === 'development'
 		? 'http://localhost:3001'
-		: process.env.NEXT_PUBLIC_SITE_URL ?? 'https://www.tldraw.dev'
+		: process.env.NEXT_PUBLIC_SITE_URL ?? 'https://tldraw.dev'
 
 export function Search() {
 	const [searchType, setSearchType] = useState<SEARCH_TYPE>(SEARCH_TYPE.NORMAL)