message: Update documentation - don't mention standalone app difference
diff: @@ -15,7 +15,7 @@ Each of the entries in the table will direct you to the error details in your de
  1. Configure the [periskop backend plugin](https://github.com/backstage/backstage/tree/master/plugins/periskop-backend/)
  -2. If you have standalone app (you didn't clone this repo), then do
  +2. Install the plugin by running:
  ```bash
  # From your Backstage root directory
  