broken link in the Introduction

[vikisel]

The link in the first lesson to the end-of-workshop challenges seems to be broken.

[tobyhodges]

Thank you for catching and reporting this, @vikisel 🙌 The episode numbering changed relatively recently, and I guess this link target was not updated to reflect that: the link should point to 09-challenges instead of 10-challenges.

Would you like to submit a pull request to fix this? I would be happy to guide you through the process, the structure of the website source repository, etc, if you would find that helpful.