Broken link: Professor Frisby's Mostly Adequate Guide to Functional Programming

[Bennik2000]

The Link Professor Frisby's Mostly Adequate Guide to Functional Programming in the Practices section is broken.

Expected behaviour:
The link is not broken and I can find the resource.

Maybe this is the correct link: https://mostly-adequate.gitbook.io/mostly-adequate-guide/

[Bennik2000]

This issue will get fixed with #177