Enable the release CI job to cut a release tag on GitHub

[seratch]

Summary

• tag releases after publishing

Testing

• pnpm build
• CI=1 pnpm test
• pnpm lint

---

https://chatgpt.com/codex/tasks/task_i_6874639348b08320b55072d7ccd916b3

[changeset-bot]

⚠️ No Changeset found

Latest commit: 756dce8

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.

This PR includes no changesets

When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types

Click here to learn what changesets are, and how to add one.

Click here if you're a maintainer who wants to add a changeset to this PR

[seratch]

oops, this part is wrong, so the tag was not automatically created.

• openai-agents-js/.github/workflows/release.yml

  Line 56 in 90654c3

  if: steps.changesets.outputs.published == 'true'

• https://github.com/openai/openai-agents-js/actions/runs/16359661137/job/46225127671

So, I created v0.0.12 tag manually. I will resolve the issue before the next release.