Fix Search Documents Sample Issue (#28516)

Fixes #27563

@joheredi, @alzimmermsft, @dgetu for notification.

sdk/search/search-documents/README.md

@@ -406,7 +406,7 @@ async function main() {
   const searchResults = await client.search("WiFi", {
     filter: odata`Rooms/any(room: room/BaseRate lt ${baseRateMax}) and Rating ge ${ratingMin}`,
     orderBy: ["Rating desc"],
-    select: ["hotelId", "hotelName", "rating"],
+    select: ["hotelId", "hotelName", "Rating"],
   });
   for await (const result of searchResults.results) {
     // Each result will have "HotelId", "HotelName", and "Rating"