Update README to correct SignalR library (#9)

***NO_CI***

Author: BrennanConroy

README.md

@@ -6,7 +6,7 @@
 
 # Welcome to the .NET **nanoFramework** SignalR Client Library repository
 
-This API mirrors (as close as possible) the official .NET [Microsoft.AspNet.SignalR.Client](https://docs.microsoft.com/en-us/aspnet/core/signalr/dotnet-client). Exceptions are mainly derived from the lack of `async` and generics support in .NET **nanoFramework**.
+This API mirrors (as close as possible) the official .NET [Microsoft.AspNetCore.SignalR.Client](https://docs.microsoft.com/en-us/aspnet/core/signalr/dotnet-client). Exceptions are mainly derived from the lack of `async` and generics support in .NET **nanoFramework**.
 
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