Right now, the website hardcodes the whole table with Infra key information. I think it'd be better to make the script get at least some of the key data (e.g. fingerprints, expiration dates) out of the keys themselves.
*** Bug 674746 has been marked as a duplicate of this bug. ***
Friendly reminder, some of the release media signatures on the Web site are currently out of date (that or the keys themselves are expired): https://www.gentoo.org/downloads/signatures/
Fixed, thanks!