use jsoniter for example

example_test.go

@@ -1,10 +1,10 @@
 package jsoniter_test
 
 import (
+	"encoding/json"
 	"fmt"
 	"github.com/json-iterator/go"
 	"os"
-	"encoding/json"
 )
 
 func ExampleMarshal() {
@@ -37,7 +37,7 @@ func ExampleUnmarshal() {
 		Order string
 	}
 	var animals []Animal
-	err := json.Unmarshal(jsonBlob, &animals)
+	err := jsoniter.Unmarshal(jsonBlob, &animals)
 	if err != nil {
 		fmt.Println("error:", err)
 	}