Fix json syntax error to enable Renovate bot

[xtremerui]

Error log taken from Renovate Dashboard. This causes the bot not creating dependency bumping PRs since it was onboarded into our repo.

DEBUG: Found .github/renovate.json config file
INFO: Repository has invalid config
{
  "error": {
    "validationSource": ".github/renovate.json",
    "validationError": "Invalid JSON (parsing failed)",
    "validationMessage": "Syntax error: expecting end of expression or separator near      \"grou",
    "message": "config-validation",
    "stack": "Error: config-validation\n    at checkForRepoConfigError (/home/ubuntu/renovateapp/node_modules/renovate/dist/workers/repository/init/merge.js:147:19)\n    at mergeRenovateConfig (/home/ubuntu/renovateapp/node_modules/renovate/dist/workers/repository/init/merge.js:169:5)\n    at async getRepoConfig (/home/ubuntu/renovateapp/node_modules/renovate/dist/workers/repository/init/config.js:15:14)\n    at async initRepo (/home/ubuntu/renovateapp/node_modules/renovate/dist/workers/repository/init/index.js:32:14)\n    at async Object.renovateRepository (/home/ubuntu/renovateapp/node_modules/renovate/dist/workers/repository/index.js:37:18)\n    at async renovateRepository (/home/ubuntu/renovateapp/app/worker/index.js:267:26)\n    at async /home/ubuntu/renovateapp/app/worker/index.js:527:5"
  }
}