message: Update Readme to correct statement about how Prague API is included
diff: @@ -14,8 +14,8 @@ Then open index.html in your browser of choice to view the example
  # How it works
  The API code itself is loaded by including
  -`<script src="https://praguenpm.blob.core.windows.net/api/Release-17/api.js"></script>`
  -in [index.html](index.html).
  +`import { api as prague } from "@prague/routerlicious";`
  +in [src/index.ts](src/index.ts).
  The code for the example is in [src/index.ts](src/index.ts). The example loads a collaborative document which contains
  a single text string. A basic HTML form is then used to insert text into the string.
  