Fix programming sample link

The link was missing "/tree/master"

TTD/docs/README.md

@@ -5,5 +5,5 @@ This documentation describes all the packages and APIs offered to interact with
 ## Links
 
 - [Microsoft.TimeTravelDebugging.Apis](Microsoft.TimeTravelDebugging.Apis.md) NuGet package
-- [TTD programming samples](https://github.com/microsoft/WinDbg-Samples/TTD) repository
+- [TTD programming samples](https://github.com/microsoft/WinDbg-Samples/tree/master/TTD) repository
 - [TTD user documentation](https://aka.ms/ttd) including installation instructions, use cases and command-line options.