Merge pull request #610 from rokx/patch-1

Update README.md

Author: SamProf

README.md

@@ -32,6 +32,7 @@ Complete all Blazor dependencies.
 
 - .NET Core 3.1
 - Visual Studio 2019 with the ASP.NET and web development workload selected.
+- Requires access to internet for CSS download
 
 ## Installation