Previously, we switched from ntp to chrony. However, since chrony
conflicts with ntp, this change in dependency causes
unattended-upgrades to skip upgrading freedombox.
Switch to systemd-timesyncd, which does not conflict with either
package. We can switch back to chrony after all users have upgraded to
the most recent release.
Closes#1486
Signed-off-by: James Valleroy <jvalleroy@mailbox.org>
Reviewed-by: Sunil Mohan Adapa <sunil@medhas.org>