message: Add missing step in readme instructions
diff: **Collaborative TextArea** is a basic example that creates a SharedString and uses the react CollaborativeTextArea
  component to launch a basic collaborative HTML `<textarea>`
  -<!-- AUTO-GENERATED-CONTENT:START (GET_STARTED) -->
  +<!-- AUTO-GENERATED-CONTENT:START (GET_STARTED:tinylicious=true) -->
  <!-- The getting started instructions are automatically generated.
  To update them, edit docs/md-magic.config.js, then run 'npm run build:md-magic' -->
  @@ -14,6 +14,7 @@ You can run this example using the following steps:
  1. Run `npm install` and `npm run build:fast -- --nolint` from the `FluidFramework` root directory.
  a. For an even faster build, you can add the package name to the build command, like this:
  `npm run build:fast -- --nolint @fluid-example/collaborative-textarea`
  +1. In a separate terminal, start a Tinylicious server by following the instructions in [Tinylicious](../../../server/tinylicious).
  1. Run `npm run start` from this directory (examples/apps/collaborative-textarea) and open <http://localhost:8080> in a web browser to see the app running.
  <!-- AUTO-GENERATED-CONTENT:END -->
  