docs: add links to forecast-actual format repos

[dsweber2]

The actual location of the links is in limbo for a bit, and ideally we'd be regenerating this, but the static version would also be useful.

[dsweber2]

Ope, that's what I get for moving too quick. It should be down to just the actual change.

[nmdefries]

Could you add Ryan's script to the repo? And update the reference to it on the "About" page.

[dsweber2]

script added; the link won't be usable until we merge this into main.