Broken link on "prep-critical-thinking"

The [prep critical thinking block](https://github.com/CodeYourFuture/CYF-PD/blob/main/content/blocks/prep-critical-thinking/readme.md) under JS1 Sprint 1 contains links that direct to a 404 page.

@PERicci has suggested that alternative content available on the same site, however it does not fit the "video" format as per the block:
https://www.thedevelopmentmanager.co.uk/post/professional-personal-development-skills-critical-thinking/

**Additional context**
Link to live site: https://cyf-curriculum.netlify.app/js1/sprints/1/prep/#critical-thinking