Suggested Updates for 10/28 Workshop

[HAIL9000]

• The vibrator kits now come with two AA batteries! There are several things in Chapter 2 that should be updated to reflect this
• It may be helpful to define "pin" earlier in the workshop. It's sort of defined in Chapter 5 but at that point has already been referenced before that. Some kind of definition that describes it as a way to send signals to hardware and that we can control what kind of signal it sends to make the hardware react differently (e.g. the vibrator intensity)
• I think Chapter 7 could benefit from a note in the section talking about the knob that it will also need to be initialized with pinMode in setup (it's called out for the vibrator and the LED, I feel like it might be less confusing if it's also called out for the knob)