Module 2 Hands-on asks participants to download data but it's already in Module 4

[jack89roberts]

The Module 2 hands-on notebook asks participants to download the data themselves and update a path, but the path is already set to one in Module 4 where we have the dataset already.

I think the original intent was:

• Module 1: Look/think about the data without necessarily downloading it, do some planning on GitHub
• Module 2: Download the data (after checking licensing etc.) and start working with it
• Modules 3-4: Continue working with it

We need the data somewhere to run the notebooks for building the website, but the way it's currently written is confusing.