message: README: Mention necessary Hugo version
  We've recently seen a few problems where people were getting build
  failures due to using a Hugo version that's too old.
diff: @@ -15,7 +15,7 @@ Datenanfragen.de is designed as a static website, running on [Hugo](https://gohu
  To build the project locally for development, follow these steps:
  -1. Install [Yarn](https://classic.yarnpkg.com/en/docs/install) and the extended(!) version of [Hugo](https://gohugo.io/getting-started/quick-start/).
  +1. Install [Yarn 1](https://classic.yarnpkg.com/en/docs/install) (Classic) and the extended(!) version of [Hugo](https://gohugo.io/getting-started/quick-start/) (v0.88.1).
  2. Clone the repo and run `yarn` in the root directory of the repo to fetch all required dependencies.
  3. Run the deploy script (`./deploy.sh`) to fetch and prepare the required resources from our [data](https://github.com/datenanfragen/data) repository.
  4. Open two terminal windows. In the first, run `yarn dev` to start the Webpack file watcher which will automatically build the JS files. In the second one, run `hugo server` to have Hugo continously build the actual website and the SCSS.
  