Consider adding instructions on how to use hotspot QR code from other devices

In !106 (merged), @rohmishra proposed adding instructions on how to use the QR code for a wireless hotspot on other devices. I don't want to try to push this into 40, and it doesn't fit well in our small task format. But I have some ideas on how to document additional tasks and material that I'd like to visit in 41. So let's keep this on the radar for then.