clarifies the puppet-strings usage

[binford2k]

This is part of the OpenVox rebranding. This summary string is part of
the puppet --help output.

Summary

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Additional Context

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• Root cause and the steps to reproduce. (If applicable)
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Related Issues (if any)

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Checklist

• 🟢 Spec tests.
• 🟢 Acceptance tests.
• Manually verified.

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