Update README.md (#106)

Author: BrennanConroy

README.md

@@ -1,8 +1,11 @@
+> [!WARNING]
+> This project is in alpha mode and not recommended for production use. Use at your own risk.
+
 # ASP.NET Core SignalR C++ Client
 
 This project is part of ASP.NET Core. You can find samples, documentation and getting started instructions for ASP.NET Core at https://github.com/aspnet/AspNetCore.
 
-Use https://github.com/aspnet/AspNetCore/issues for issues with this project.
+Use https://github.com/dotnet/aspnetcore/issues for issues with this project.
 
 ## Install this library