fix(typo): typo in kubernetes.go

[atorik]

What this PR does / why we need it :
This commit fixes typo in kubernetes.go.

Checklist:

• Fixes #
• PR Title follows the convention of <type>(<scope>): <subject>
• Has the change log section been updated?
• Commit has unit tests
• Commit has integration tests
• (Optional) Are upgrade changes included in this PR? If not, mention the issue/PR to track:
• (Optional) If documentation changes are required, which issue on https://github.com/openebs/website is used to track them: