[coreboot] Certificate expired

[Galarazamba]

Dear Coreboot Team,

I am trying to build a Heads x230-maximized.rom on Debian 10.4.0,

but right at the beginning I get the error, that the certificate of
www.coreboot.org cannot be trusted because it has expired.

Updating my ca-certificates in Debian hasn't helped. Do you have any
further ideas?

Thanks in advance for your help, keep up your awesome work!