[Clas12_software] github authentication changes

[Nathan Baltzell]

FYI All,

Just a reminder, you should have received notifications from github on this over the past year ... password-based CLI authentication is supposed to stop working in a few days and will require switching to ssh-keys or tokens:

https://github.blog/2020-12-15-token-authentication-requirements-for-git-operations/

(ssh keys seem a bit easier to setup, but currently do not work behind the hallgw firewall.)

-Nathan