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

Author: renovate[bot]

package-lock.json

@@ -69,7 +69,7 @@
     "@edx/browserslist-config": "^1.1.1",
     "@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",
     "glob": "10.4.5",
     "reactifex": "1.1.1",