getting started tutorial: change windows browser from IE to Edge (MINOR)

**Where**
Student getting started setup: l https://github.com/codebar/tutorials/blob/gh-pages/general/setup/tutorial.md

**What**
First line of subheading 'A web browser (required)' states that Windows comes with Internet Explorer.  I would suggest changing it to say Edge (even if IE still does come with Windows 10)

**Am I willing to fix**
Yes if others think it makes sense
