chore(deps): update dependency @testing-library/jest-dom to v6.6.3

Author: renovate[bot]

package-lock.json

@@ -65,7 +65,7 @@
     "@edx/browserslist-config": "^1.2.0",
     "@edx/reactifex": "2.2.0",
     "@openedx/frontend-build": "14.1.5",
-    "@testing-library/jest-dom": "6.6.2",
+    "@testing-library/jest-dom": "6.6.3",
     "@testing-library/react": "12.1.5",
     "axios-mock-adapter": "2.1.0",
     "babel-plugin-react-intl": "8.2.25",