make finance-admin role alias for jon, sue, sarah
This is so there is a single long term address they can use when making accounts on various third parties, like Fidelity Charitable and the like.
The alternative is that Jon uses jon@tpo when making the accounts, and then later when we want to shift responsibilities around, he's stuck being the contact for those external accounts.
Jon originally suggested adminfinance@tpo, I guess on the theory that it's more about the admin of the finance. I countered with finance-admin, which better matches the pattern of e.g. torproject-admin.
And I'm going to make the role alias now, since the email thread has been around for a week and nobody else said anything on it. :)