fix(release): use the renamed changesets/action v2 inputs

[unional]

Summary

The release workflow has failed on every push to main since 2026-09-05 — eight consecutive runs — so this package has not published in about six days.

Renovate bumped the action (2b56f71a8 to v2, then a01f35e37 to v2.1.2) without updating the call site, and v2 renamed its inputs. The step still passed the v1 names, so the action refused to run:

##[error]The following inputs have been renamed:
- "publish" -> "publish-script"
- "version" -> "version-script"
- "commit"  -> "commit-message"

This renames the three keys. pnpm verify was already passing in those runs; only this step failed.

buddy-agent-harness is on the same changesets/action@v2.1.2 with the corrected names and its release succeeds, so this brings the two into line.

Test plan

• Input names match the working buddy-agent-harness workflow exactly
• The release run on main after merge opens a Version Packages PR — it should cover every changeset accumulated since 2026-09-05, not just the most recent one

No changeset: this touches only .github/, which is not part of the published package.

🤖 Generated with Claude Code

https://claude.ai/code/session_01YFKdPvMquYJP5DkcJQ4T5t

[changeset-bot]

⚠️ No Changeset found

Latest commit: 027dd1f

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (c3b6470) to head (027dd1f).

Additional details and impacted files

@@            Coverage Diff            @@
##              main       #52   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            3         3           
  Lines           75        75           
  Branches        25        25           
=========================================
  Hits            75        75           

Flag	Coverage Δ
unit	100.00% <ø> (ø)

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