Start using github security advisories

[Joseph Reynolds]

Per today's Security working group meeting, we want to start using 
[GitHub security advisories][].  I think we need someone with admin 
permissions to github.com/openbmc/openbmc to create new advisories. Then 
we'll want a group (team? perhaps security-response-team) with the 
current OpenBMC [security response team][] members.  (I have that list.)

How do we get started?  Who has admin authority?

Joseph


[GitHub security advisories]: 
https://docs.github.com/en/code-security/security-advisories/about-github-security-advisories
[security response team]: 
https://github.com/openbmc/docs/blob/master/security/obmc-security-response-team-guidelines.md