⬆️ Update dependency eslint to v9

Author: renovate[bot]

nextcloud_backup/frontend/package.json

@@ -28,7 +28,7 @@
     "@vitejs/plugin-vue": "^5.0.0",
     "@vue/eslint-config-typescript": "^13.0.0",
     "cross-env": "^7.0.3",
-    "eslint": "^8.57.0",
+    "eslint": "^9.0.0",
     "eslint-config-standard": "^17.1.0",
     "eslint-config-vuetify": "^1.0.0",
     "eslint-plugin-import": "^2.29.1",