chore(deps): update dependency @antfu/eslint-config to v9

Author: renovate[bot]

package.json

@@ -53,7 +53,7 @@
     "unplugin": "^2.3.11"
   },
   "devDependencies": {
-    "@antfu/eslint-config": "^6.2.0",
+    "@antfu/eslint-config": "^9.0.0",
     "@swc/core": "^1.15.33",
     "@types/node": "^24.10.1",
     "defu": "^6.1.4",