Replace bgColor for StateLabel draft with new draft token

[lukasoppermann]

Replace bgColor for StateLabel draft with new draft token. Using a fallback as we did not yet release and merge primitives into dotCom.

Closes # https://github.com/github/primer/issues/5902

Changelog

New

Changed

Removed

Rollout strategy

• Patch release
• Minor release
• Major release; if selected, include a written rollout or migration plan
• None; if selected, include a brief description as to why

Testing & Reviewing

Merge checklist

• Added/updated tests
• Added/updated documentation
• Added/updated previews (Storybook)
• Changes are SSR compatible
• Tested in Chrome
• Tested in Firefox
• Tested in Safari
• Tested in Edge
• (GitHub staff only) Integration tests pass at github/github (Learn more about how to run integration tests)

[changeset-bot]

🦋 Changeset detected

Latest commit: 3e73129

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 2 packages

Name	Type
@primer/react	Patch
@primer/styled-react	Patch

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[Copilot]

Pull Request Overview

This PR replaces the background color for StateLabel components with draft status to use a new dedicated --bgColor-draft-emphasis design token, while maintaining backward compatibility through a fallback to the existing neutral color token.

Key changes:

• Updates CSS custom properties for draft StateLabels to use new design system token
• Adds fallback mechanism for compatibility during token rollout

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
packages/react/src/StateLabel/StateLabel.module.css	Updates background-color properties for draft and issueDraft states to use new token with fallback
.changeset/sweet-islands-sleep.md	Documents the change as a patch release in the changelog

[github-actions]

👋 Hi, this pull request contains changes to the source code that github/github depends on. If you are GitHub staff, we recommend testing these changes with github/github using the integration workflow. Thanks!