Change branch name from "master" to "main"

[MaikNog]

Hi,
as a small contribution, maybe the naming could be changed.
https://www.hanselman.com/blog/EasilyRenameYourGitDefaultBranchFromMasterToMain.aspx“

"git branch -m master main"
"git push -u origin main"

[Thorsten Rinne]

done