Update order of files in example

[danielgruesso]

Updating kubernetes secret creation instruction to correctly show which file should hold which data, ie. certificate on cert.pem and private key on cert.pk.

Fixes #issue-number

Proposed Changes

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[danielgruesso]

I signed it!

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[danielgruesso]

Thanks for your pull request. It looks like this may be your first contribution to a Google open source project (if not, look below for help). Before we can look at your pull request, you'll need to sign a Contributor License Agreement (CLA).

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I signed it!

[samodell]

/lgtm
/approve

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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: danielgruesso, samodell

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