Update index.md

index.md

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 ## Description
 This is a sample docfx documentation project. It contains .NET source code and markdown files.
 `docfx.json` is the configuration file for running `docfx`.
-`docfx` will generate a static website as similar to [http://docascode.github.io/docfx](http://docascode.github.io/docfx/index.html).
+`docfx` will generate a static website as similar to [http://docascode.github.io/docfx-seed](http://docascode.github.io/docfx-seed/index.html).
 
 ## How to run
 ### Under Windows
-* Download and unzip [docfx.zip](http://aspnet.github.io/docfx/tutorial/artifacts/docfx.zip) to run `docfx.exe` directly!
+* Download and unzip [docfx.zip](https://github.com/dotnet/docfx/releases/latest) to run `docfx.exe` directly!
 * Run `docfx` under current repo! Website will be generated under `_site` folder.
 * Run any web hosting tool to host `_site` folder, e.g. `docfx serve _site`.