Exclude Cloud portal int instance from link-checking
exclude https://hifis-cloud-portal-int.desy.de/ from link-checking, since it now required username+password according to https://mattermost.hzdr.de/hifis/pl/hdusk9ktbfnopcc67pc5eecj5o
exclude https://hifis-cloud-portal-int.desy.de/ from link-checking, since it now required username+password according to https://mattermost.hzdr.de/hifis/pl/hdusk9ktbfnopcc67pc5eecj5o