Bump chromaui/action from 13 to 15

Bumps [chromaui/action](https://github.com/chromaui/action) from 13 to 15.
- [Release notes](https://github.com/chromaui/action/releases)
- [Changelog](https://github.com/chromaui/action/blob/main/CHANGELOG.md)
- [Commits](chromaui/action@v13...v15)

---
updated-dependencies:
- dependency-name: chromaui/action
  dependency-version: '15'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/chromatic.yml

@@ -26,6 +26,6 @@ jobs:
         run: pnpm install
         # 👇 Adds Chromatic as a step in the workflow
       - name: Publish to Chromatic
-        uses: chromaui/action@v13
+        uses: chromaui/action@v15
         with:
           projectToken: ${{ secrets.CHROMATIC_PROJECT_TOKEN }}