fix comments in features.go

[rhrmo]

What type of PR is this?
/kind bug

What this PR does / why we need it:
This PR fixes comments in features.go so the feature gates can be properly understood.

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

NONE

[k8s-ci-robot]

Hi @rhrmo. Thanks for your PR.

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[jsafrane]

/ok-to-test

[jsafrane]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: jsafrane, rhrmo

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