replace deprecated function (#86)

diff --git a/test/e2e/cases/profiling/task/network/golang/service.go b/test/e2e/cases/profiling/task/network/golang/service.go
index 3696941..70f7da3 100644
--- a/test/e2e/cases/profiling/task/network/golang/service.go
+++ b/test/e2e/cases/profiling/task/network/golang/service.go
@@ -18,7 +18,7 @@
 package main
 
 import (
-	"io/ioutil"
+	"io"
 	"log"
 	"net/http"
 	"os"
@@ -63,7 +63,7 @@
 	if err != nil {
 		log.Printf("send request error: %v", err)
 	}
-	all, err := ioutil.ReadAll(get.Body)
+	all, err := io.ReadAll(get.Body)
 	_ = get.Body.Close()
 	if err != nil {
 		log.Printf("get response body error: %v", err)
@@ -91,7 +91,7 @@
 	if err != nil {
 		log.Printf("send request error: %v", err)
 	}
-	all, err := ioutil.ReadAll(get.Body)
+	all, err := io.ReadAll(get.Body)
 	_ = get.Body.Close()
 	if err != nil {
 		log.Printf("get response body error: %v", err)