Hayoo.pm - add 'haskell map' to triggers (Issue #800)

Hello, since it's a really minor fix on an already existent instant answer I thought I didn't need to include the template; let me know if I must include it anyway.

I have tested the change as specified in CONTRIBUTING.md.
@jagtalon haha whoops, I didn't even realize that "haskell" wasn't a trigger.

@MariagraziaAlastra if you'd like to change your PR to just add the trigger "haskell" it should be good to go :)