Rename master to main

[dneufeldcu]

Summary

As a	software development team
We want to be able to	be as effective and inclusive as possible
So that I can	not be distracted by a casual reference to slavery, a terrible wrong, that is not the most effective description of the technical process anyway

Tasks

• [ ] Rename master to main in the onestop repo

Reference

https://www.git-tower.com/learn/git/faq/git-rename-master-to-main/