Add comment in example

Former-commit-id: 2b9d7a569ed4c5d78cd5dd49865df1cf381619fc

_examples/experimental-handlers/cors/simple/main.go

@@ -13,6 +13,8 @@ import (
 func main() {
 
 	app := iris.New()
+
+	// `crs := cors.NewAllowAllPartyMiddleware()`, or:
 	crs := cors.NewPartyMiddleware(cors.Options{
 		AllowedOrigins:   []string{"*"}, // allows everything, use that to change the hosts.
 		AllowedMethods:   router.AllMethods[:],