Create a `main` branch.

Back in 2020, GitHub began making efforts to move away from master as the primary branch in repositories. Instead, the default for new repositories is main and many established repositories have already made the switch. It is recommended to change the primary branch name from master to main to keep in line with the current industry standard.

_{This is by no means a critical thing, I just noticed it and figured I would point it out.}

If this idea was adopted by this repository, another issue should likely be created to remove the master branch.

For additional information see the GitHub docs.

Thanks for the hint :) updated