fix: typo (#595)

util/http.go

@@ -65,7 +65,7 @@ func HTTPPostContext(ctx context.Context, uri string, data []byte, header map[st
 
 	defer response.Body.Close()
 	if response.StatusCode != http.StatusOK {
-		return nil, fmt.Errorf("http get error : uri=%v , statusCode=%v", uri, response.StatusCode)
+		return nil, fmt.Errorf("http post error : uri=%v , statusCode=%v", uri, response.StatusCode)
 	}
 	return ioutil.ReadAll(response.Body)
 }