Enable the "gosec" linter for CI, and fix the one issue in our code.

[dlorenc]

Changes

The "issue" is actually a false positive, so it is fixed by adding an annotation.

Submitter Checklist

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• Includes tests (if functionality changed/added)
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Double check this list of stuff that's easy to miss:

• If you are adding a new binary/image to the cmd dir, please update
  the release Task to build and release this image.

Reviewer Notes

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Release Notes

[imjasonh]

/lgtm

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