chore(deps): update devdependency happy-dom to v20 [security]

Author: renovate[bot]

package.json

@@ -155,7 +155,7 @@
     "@valibot/to-json-schema": "^1.3.0",
     "csvtojson": "^2.0.10",
     "eslint": "^9.37.0",
-    "happy-dom": "^19.0.2",
+    "happy-dom": "^20.0.0",
     "mdclint": "^0.0.3",
     "micromark-util-types": "^2.0.2",
     "nuxt": "^4.1.3",