Fix example code for skipping array elements (php#4851)

Author: DanielEScherzer

language/control-structures/foreach.xml

@@ -161,7 +161,7 @@ A: 3; B: 4
 <![CDATA[
 <?php
 $array = [
-    [1, 2, 3],
+    [1, 2, 5],
     [3, 4, 6],
 ];