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

Author: renovate[bot]

package.json

@@ -38,7 +38,7 @@
     "prism-theme-vars": "^0.2.5"
   },
   "devDependencies": {
-    "@antfu/eslint-config": "^8.2.0",
+    "@antfu/eslint-config": "^9.0.0",
     "@eslint/js": "^10.0.1",
     "@eslint/markdown": "^8.0.1",
     "@slidev/cli": "^52.14.2",