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.
@moollaza oh, ok, thank you for the explanation, I guess that even if it's really a bug it would need investigations and maybe a separate issue? (But from what I have seen so far I think it must be due to relevancy, as you said).

So, well, I will look for something else to work on :)