chore(deps): update dependency eslint to v9

Author: renovate[bot]

package.json

@@ -70,7 +70,7 @@
     "@types/string-similarity": "^4.0.2",
     "@typescript-eslint/eslint-plugin": "7.18.0",
     "@typescript-eslint/parser": "7.18.0",
-    "eslint": "8.57.1",
+    "eslint": "9.21.0",
     "eslint-config-prettier": "^9.1.0",
     "eslint-plugin-mdx": "^3.1.5",
     "eslint-plugin-tailwindcss": "3.17.5",