Bug: Chapter 13: Link to Inigo Quiles broken

[fogx]

The link to the article about domain warping is broken here

This is the correct link: https://iquilezles.org/articles/warp/

[fogx]

Seems like all the links to iquilezles.org broke, as the file structure has changed from http://www.iquilezles.org/www/articles/ to https://iquilezles.org/articles/ and the ending also dropped the htm part.
E.g:
http://www.iquilezles.org/www/articles/functions/functions.htm ->
https://iquilezles.org/articles/functions/