Update kubelet overview help doc

[deitch]

What type of PR is this?

Uncomment only one /kind <> line, hit enter to put that in a new line, and remove leading whitespaces from that line:

/kind api-change
/kind bug
/kind cleanup
/kind design

/kind documentation

/kind failing-test
/kind feature
/kind flake

What this PR does / why we need it:

Completes documentation change updated as discussed with @liggitt at kubernetes/website#12336

Special notes for your reviewer:
Minor documentation change. Originally was placed in https://github.com/kubernetes/website, but that page is auto-generated.

Does this PR introduce a user-facing change?:

Update kubelet CLI summary documentation and generated Webpage

cc @liggitt

[k8s-ci-robot]

Hi @deitch. Thanks for your PR.

I'm waiting for a kubernetes member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[deitch]

/assign @liggitt

[liggitt]

/ok-to-test
/lgtm

will defer to kubelet approvers
/assign @yujuhong

[deitch]

Can anyone explain why this failed? All I changed is a bit of text.

[yujuhong]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: deitch, yujuhong

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• cmd/kubelet/OWNERS [yujuhong]

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[fejta-bot]

/retest
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