Security fix: Update happy-dom to 20.3.9 to patch VM Context Escape vulnerability

Co-authored-by: hotlong <50353452+hotlong@users.noreply.github.com>

Author: Copilot

examples/msw-object-form/package.json

@@ -38,7 +38,7 @@
     "@vitejs/plugin-react": "^4.3.4",
     "@vitest/ui": "^4.0.18",
     "autoprefixer": "^10.4.23",
-    "happy-dom": "^15.11.7",
+    "happy-dom": "^20.0.0",
     "msw": "^2.12.7",
     "postcss": "^8.5.6",
     "tailwindcss": "^4.1.18",