Merge pull request #202 from 01-edu/listsize-chg

fix sintax error

subjects/listsize.en.md

@@ -7,14 +7,14 @@ Write a function `ListSize` that returns the number of elements in the list.
 ### Expected function and structure
 
 ```go
-type Node struct {
+type NodeL struct {
 	Data interface{}
-	Next *Node
+	Next *NodeL
 }
 
 type List struct {
-	Head *Node
-	Tail *Node
+	Head *NodeL
+	Tail *NodeL
 }
 
 func ListSize(l *List) int {
@@ -35,7 +35,7 @@ import (
 )
 
 func main() {
-	link := &List{}
+	link := &piscine.List{}
 
 	piscine.ListPushFront(link, "Hello")
 	piscine.ListPushFront(link, "2")