docs: use apt instead of apt-get
docs: use apt instead of apt-get

Signed-off-by: Christian Berendt <bba93d43bbb6016164bf7e90a778c70b957db7ac@b1-systems.de>

font/ceph-ansible,ceph/ceph-ansible,fgal/ceph-ansible,fgal/ceph-ansible,ceph/ceph-ansible,font/ceph-ansible