bug#41783: Broken links to https://hydra.gnu.org/

[Xu Chunyang]

On https://guix.gnu.org/packages/ there are several links to
https://hydra.gnu.org/ such as
https://hydra.gnu.org/jobset/gnu/master#tabs-status which can't be
opened, Chrome reports NET::ERR_CERT_COMMON_NAME_INVALID