Fix BackupSchedule human marshaller

[remyleone]

Description:

How to reproduce:

Command attempted

Expected Behavior

Backup Schedule:
Disabled false
Frequency 24 hours
Retention 1 days

Actual Behavior

Backup Schedule:
Disabled false
Frequency 24 days
Retention 1 days

More info

Version

Version 2.0.0-beta.4+dev
BuildDate unknown
GoVersion go1.14.4
GitBranch unknown
GitCommit unknown
GoArch amd64
GoOS darwin