Update install instructions bitmask.net dl.bitmask.net
Our instructions on installing are out-of-date here: https://dl.bitmask.net/linux/ (identical to https://bitmask.net/en/install)
This needs to be updated here: https://leap.se/git/bitmask_help.git and dl_bitmask_net. Especially the 'fat bitmask' client should be removed, install instructions for snap/deb/... added, version string updated, and the same for macOS and Windows.