Update the link of Natural Language Processing professor Mike Collins

[jsingh]

As you mention here the video are not available and I go through the link it's not there so it would be better to update with this link

[Nirant]

Hey @jsroyal, sorry for the delay in updating the link. We have added the video links in a recent commit here: 1718162

@keon, maybe we can close this issue?

[Keon]

@NirantK sure thanks