Release 4.6.8

• tukit: Properly handle overlay syncing failures: If the system would not be rebooted and several snapshots accumulated in the meantime, it was possible that the previous base snapshot - required for /etc syncing - was deleted already. In that case changes in /etc might have been reset. [gh##116] [gh#kube-hetzner/terraform-hcloud-kube-hetzner#1287]
• soft-reboot: Log requested reboot type
• soft-reboot: Don't force hard reboot on version change only