Change Kubernetes etcd cronjob example to backup daily at 1am

[c3y1huang]

Make sure it's tested

n/a

Describe your changes

Change Kubernetes etcd cronjob example to backup daily at 1am.

Related Issues / Projects

Relates to: #864

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Label	Description
P1	PR should be worked on and merged as soon as possible
Blocked	Work can not proceed because other work has not been completed, PR can not be merged (code has not been merged but documentation is ready)
On-Hold	Underlying work is completed but the PR should not be merged
ReleaseNotes	User interaction is required after the introduction of this change and the change must be mentioned in the release notes
v3/v4/v4.x	Which version of the release the PR should be merged into, this can be multiple versions, please set the "Backport" label if it needs to go into a previous release
Needs Review	Some details of the PR are known to be incomplete and must be discussed with other engineers before merging (if possible assign reviewers or cc mention in comments), PR can not be merged

Signed-off-by: Chin-Ya Huang chin-ya.huang@suse.com