fix: cli: Add print to unseal cmd

[rjan90]

Proposed Changes

Add a Unsealing sector XX print to lotus-miner sectors unseal cmd

Checklist

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• Commits have a clear commit message.
• PR title is in the form of of <PR type>: <area>: <change being made>
  • example: fix: mempool: Introduce a cache for valid signatures
  • PR type: fix, feat, build, chore, ci, docs, perf, refactor, revert, style, test
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• Tests exist for new functionality or change in behavior
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