chore(deps): update dependency @testing-library/jest-dom to v6

Author: renovate[bot]

package-lock.json

@@ -36,7 +36,7 @@
     "@edx/frontend-platform": "^8.2.1",
     "@openedx/frontend-build": "^14.3.1",
     "@openedx/paragon": "^23.3.0",
-    "@testing-library/jest-dom": "^5.16.4",
+    "@testing-library/jest-dom": "^6.0.0",
     "@testing-library/react": "^16.2.0",
     "@testing-library/dom": "^10.4.0",
     "@testing-library/user-event": "^14.6.1",