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

Author: renovate[bot]

package.json

@@ -16,7 +16,7 @@
     "release": "bumpp"
   },
   "devDependencies": {
-    "@antfu/eslint-config": "7.6.1",
+    "@antfu/eslint-config": "9.0.0",
     "@types/node": "24.11.0",
     "@vitest/coverage-v8": "4.1.7",
     "bumpp": "11.0.1",