Bump @testing-library/jest-dom from 6.5.0 to 6.6.1 in /app/assets

Bumps [@testing-library/jest-dom](https://github.com/testing-library/jest-dom) from 6.5.0 to 6.6.1.
- [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@v6.5.0...v6.6.1)

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

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

app/assets/package.json

@@ -88,7 +88,7 @@
     "@nulib/dcapi-types": "^2.5.0",
     "@nulib/prettier-config": "^1.2.0",
     "@testing-library/dom": "^10.4.0",
-    "@testing-library/jest-dom": "^6.5.0",
+    "@testing-library/jest-dom": "^6.6.1",
     "@testing-library/react": "^16.0.1",
     "@testing-library/user-event": "^14.5.2",
     "@types/jest": "^29.5.13",