updated docs to reflect that feign will now handle Generics

docs/src/main/asciidoc/spring-cloud-netflix.adoc

@@ -384,7 +384,7 @@ public class Application extends FeignConfigurer {
 ----
 public interface StoreClient {
     @RequestMapping(method = RequestMethod.GET, value = "/stores")
-    Stores getStores();
+    List<Store> getStores();
 
     @RequestMapping(method = RequestMethod.POST, value = "/stores/{storeId}", consumes = "application/json")
     Store update(@PathParameter("storeId") Long storeId, Store store);