chore(deps): update dependency eslint to v9

Author: renovate[bot]

package.json

@@ -51,7 +51,7 @@
     "@types/react": "^19.1.0",
     "@types/react-dom": "^19.1.1",
     "dotenv": "^17.0.0",
-    "eslint": "^8",
+    "eslint": "^9.0.0",
     "eslint-config-next": "15.3.5",
     "postcss": "^8.5.6",
     "tailwindcss": "^4.1.10",