Typo in capdctl --help

[liztio]

What this PR does / why we need it:
It's spelled wrong and it bothers me

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes

Special notes for your reviewer:

Please confirm that if this PR changes any image versions, then that's the sole change this PR makes.

Release note:

NONE

[k8s-ci-robot]

Welcome @liztio!

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[detiber]

/lgtm

[ashish-amarnath]

/approve

[chuckha]

/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: ashish-amarnath, chuckha, liztio

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• OWNERS [chuckha]

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