Update valhalla example

site/content/jdk/valhalla/_index.md

@@ -7,16 +7,24 @@ Online sandbox for the latest early access build of [Valhalla project](https://j
 {{< sandbox version="javavalhalla" mainclass="Valhalla" preview="true" >}}
 {{< sandboxsource "Valhalla.java" >}}
 value class X {
-}
 
-identity record Id(String key) {
+final int i;
+
+    X(int i) {
+        this.i = i;
+    }
+
 }
 
 public class Valhalla {
 
     public static void main(String[] args) {
-        System.out.println(new X());
-        System.out.println(new Id("me"));
+        var x1 = new X(5);
+        var x2 = new X(5);
+        var x3 = new X(7);
+
+        System.out.println(x1 == x2);
+        System.out.println(x1 == x3);
     }
 
 }