Update wiki

[KevinDaSilvaS]

Hi, I noticed while reading the README that there's a link with a private youtube video: https://www.youtube.com/watch?v=kNqsOBrCbLo and also noticed that in this link, the word elegant is not correctly written: English: Spock - Powerful "Elegent" Web Applications using Haskell (by Alexander Thiemann) So I would like to either remove the private video link or to fix the "Elegent" word if possible