[BUG] Dead link on a playlist for Discrete Mathematics

[lksmrqrdt]

Describe the bug
A clear and concise description of what the bug is.

The playlist Introduction to mathematical thinking for the module Discrete Mathematics doesn't exist.

To Reproduce
Steps to reproduce the behavior:

1. https://github.com/world-class/REPL/tree/master/modules/level-4/cm-1020-discrete-mathematics#supplementary-videos
2. Click on any of the playlists Introduction to mathematical thinking.
3. Get the error, that the playlist doesn't exist.

Expected behavior
A clear and concise description of what you expected to happen.

I would expect the playlist containing the relevant videos to be shown.

Desktop (please complete the following information):

• OS: macOS Monterey 12.5.1
• Browser: Safari
• Version: 16.0

[sglavoie]

Thank you for pointing this out! I've linked to available videos for now, although any PR or issue proposing alternatives will of course be welcome.

@all-contributors please add @lksmrqrdt for bug

[allcontributors]

@sglavoie

I couldn't determine any contributions to add, did you specify any contributions?
Please make sure to use valid contribution names.

I've put up a pull request to add @videos! 🎉

I've put up a pull request to add @lksmrqrdt! 🎉