C# API reference and link to generated source code

The links to generated source code does not work (404).

For example:
https://docs.icerpc.dev/api/csharp/api/IceRpc.StatusCode.html
https://github.com/icerpc/icerpc-csharp/blob/main/src/IceRpc/generated/StatusCode.cs/#L22 (404)




