fix: renovate.json

Author: koromerzhin

renovate.json

@@ -16,7 +16,6 @@
       "matchPackageNames": ["node"],
       "extractVersion": "^v?(?<version>\\d+\\.\\d+\\.\\d+)$",
       "depType": "engines",
-      "datasource": "node",
       "versioning": "node",
       "enabled": true,
       "groupName": "Update Node.js version (.nvmrc)"