chore(deps): update devdependency happy-dom to v20 (#277)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

package.json

@@ -50,7 +50,7 @@
     "changelogen": "^0.6.2",
     "crawler-user-agents": "^1.22.0",
     "eslint": "^9.39.1",
-    "happy-dom": "^18.0.1",
+    "happy-dom": "^20.0.11",
     "nuxt": "^4.2.1",
     "playwright": "^1.57.0",
     "typescript": "^5.9.3",