message: Update Blazor test plan to reflect `public` requirement on parameters.
diff: @@ -151,7 +151,7 @@ To setup a test project to verify on you can do:
  * Open `Counter.razor`, in the `@functions { ... }` block add:
  ```C#
  [Parameter]
  - private int IncrementAmount { get; set; }
  + public int IncrementAmount { get; set; }
  ```
  - Save `Counter.razor` then wait 5 seconds.
  - Go back to `Index.razor` and type `<Counter |`, hit ctrl space, search for `IncrementAmount` attribute, commit the completion. Ensure that it auto-completes to `<Counter IncrementAmount="|"`
  