Bump @testing-library/jest-dom from 5.17.0 to 6.1.4 in /theme (#663)

* Bump @testing-library/jest-dom from 5.17.0 to 6.1.4 in /theme

Bumps [@testing-library/jest-dom](https://github.com/testing-library/jest-dom) from 5.17.0 to 6.1.4.
- [Release notes](https://github.com/testing-library/jest-dom/releases)
- [Changelog](https://github.com/testing-library/jest-dom/blob/main/CHANGELOG.md)
- [Commits](testing-library/jest-dom@v5.17.0...v6.1.4)

---
updated-dependencies:
- dependency-name: "@testing-library/jest-dom"
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

* chore: update lockfile and test setup

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Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Josh Black <[email protected]>