chore: use out.String() instead of string(out.Bytes())

[testwill]

What type of PR is this?

/kind cleanup

What this PR does / why we need it: should use out.String() instead of string(out.Bytes()) Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

NONE

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In response to [this](https://github.com/kubernetes/cloud-provider-aws/pull/621#pullrequestreview-1535102779): > Instructions for interacting with me using PR comments are available [here](https://git.k8s.io/community/contributors/guide/pull-requests.md). If you have questions or suggestions related to my behavior, please file an issue against the [kubernetes/test-infra](https://github.com/kubernetes/test-infra/issues/new?title=Prow%20issue:) repository.

[cartermckinnon]

This is a trivial edit, but I don't see any additional cleanup we can do to bulk it up.

/ok-to-test /kind cleanup /triage accepted

[cartermckinnon]

/lgtm

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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: cartermckinnon, hakman

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