Anglicize horse noise.

Author: coke

doc/Language/haskell-to-p6.pod6

@@ -138,7 +138,7 @@ an Enum.
 
     testAnimal :: Animal -> String
     testAnimal Dog   = "Woof"
-    testAnimal Horse = "Ney"
+    testAnimal Horse = "Neigh"
 
 A Perl6 Enum does not fit the same exact use cases, but it can be used in putting
 constraints on types.
@@ -147,7 +147,7 @@ constraints on types.
 
     proto sub test-animal( Animal        ) {*}
     multi sub test-animal( Dog           ) { 'Woof' }
-    multi sub test-animal( Animal::Horse ) { 'Ney'  }   # more explicit
+    multi sub test-animal( Animal::Horse ) { 'Neigh'  }   # more explicit
 
     say test-animal Animal::Dog; # more explicit
     say test-animal Horse;