fix(deploy): remove duplicate glob pattern in manifest cleanup loop

[leoshi01]

The openshell-*.yaml pattern was listed twice in the stale manifest cleanup loop, causing redundant iteration over the same files.

Summary

Related Issue

Changes

Testing

• mise run pre-commit passes
• Unit tests added/updated
• E2E tests added/updated (if applicable)

Checklist

• Follows Conventional Commits
• Commits are signed off (DCO)
• Architecture docs updated (if applicable)

[github-actions]

All contributors have signed the DCO ✍️ ✅
_{Posted by the DCO Assistant Lite bot.}

[leoshi01]

recheck

[leoshi01]

I have read the DCO document and I hereby sign the DCO.

[leoshi01]

Hi @drew ,
thanks for the approval! I don't have write access to this repo,
so the merge button isn't available to me. Could you either help merge this PR
or grant me write access? Happy either way. Thanks!