Update README.md

Added link to demo

Author: abbottmw

README.md

@@ -7,4 +7,6 @@ Things being tested.
  3. Focus Trapping
 
 Results are  Blazored.Modal is not being read by [NVDA](https://www.nvaccess.org/) (screen reader tested with).  
-Also other issues with focus trap and custom layouts.
+Also other issues with focus trap and custom layouts.
+
+## [Demo](https://abbottmw.github.io/Blazor-Modal-Accessibility-Testing/)