[heroes] private wiki moved to progress.o.o/opensuse-admin-wiki

Hello, as decided at the heroes offsite, I have created a new subproject called opensuse-admin-wiki, and have migrated the wiki from opensuse-admin to this new subproject. It is a private subproject, so that we can have sensitive information there. For public information we can still use the en.opensuse.org wiki as well https://progress.opensuse.org/projects/opensuse-admin-wiki/wiki -- Theo Chatzimichos System Administrator SUSE Operations and Services Team