Dispatch CI for the changesets release PR

[devin-ai-integration]

Summary

changesets/action pushes changeset-release/main with the default GITHUB_TOKEN, and GitHub doesn't fire push events for those pushes, so release PRs (e.g. #53) merge with zero checks. workflow_dispatch is exempt from that rule, so release.yml now dispatches test.yml on the release branch right after changesets runs:

- if: steps.changesets.outputs.pullRequestNumber != ''
  run: gh workflow run test.yml --ref changeset-release/main

test.yml gains workflow_dispatch, and release.yml gains actions: write so it can dispatch.

Test plan

• Next release PR shows a Test check on its head commit

Link to Devin session: https://app.devin.ai/sessions/36d7cf5b15504c70b8845cb26b472086
Open in Devin Desktop: https://app.devin.ai/desktop/session/36d7cf5b15504c70b8845cb26b472086?variant=devin
Requested by: @potluck

[devin-ai-integration]

🤖 Devin AI Engineer

I'll be helping with this pull request! Here's what you should know:

✅ I will automatically:

• Address comments on this PR. Add '(aside)' to your comment to have me ignore it.
• Look at CI failures and help fix them

Note: I can only respond to comments from users who have write access to this repository.

⚙️ Control Options:

• Disable automatic comment, CI, and merge conflict monitoring

[changeset-bot]

⚠️ No Changeset found

Latest commit: 999f7bf

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