Update Master Branch to Say "Main"

## Feature Request

### Description of Problem:
...Master Branch should be named Main to keep with Industry standard

...please resist the temptation to describe your request in terms of a solution. Job Story form ("When [triggering condition], I want to [motivation/goal], so I can [outcome].") can help ensure you're expressing a problem statement.

### Potential Solutions:
...clearly and concisely describe what you want to happen. Add any considered drawbacks.

... if you've considered alternatives, clearly and concisely describe those too.