Correct variable name in ^ twigil example

Author: paultcochrane

lib/Language/variables.pod

@@ -223,7 +223,7 @@ block in the code
 
     =for code :allow<B>
     for ^4 {
-        say "B<$^seconds> follows B<$^first>";
+        say "B<$^second> follows B<$^first>";
     }
 
 which prints