Lesson 3 - C - Add Challenge

[pankonen]

Add a challenge to lesson 3 for groups that finish early or want to learn/explore more.

Some examples:

• Calculate altitude from pressure
• Calculate different temperature conversions (celsius, Fahrenheit, etc)
• Links to module docs, what else could they do with it

What to add:

• Explain the challenge
• Present some ideas
• Define what success looks like

[tdeknecht]

Closed via https://github.com/StateFarm-STEM/hablogger/pull/142