message: Fix backend-plugin document typo
diff: @@ -99,7 +99,7 @@ import carmen from './plugins/carmen';
  async function main() {
  // ...
  const carmenEnv = useHotMemoize(module, () => createEnv('carmen'));
  - apiRouter.use('/carmen', await carmen(badgesEnv));
  + apiRouter.use('/carmen', await carmen(carmenEnv));
  ```
  After you start the backend (e.g. using `yarn start-backend` from the repo
  