Update aspnetcore/security/samesite.md

Author: danroth27

aspnetcore/security/samesite.md

@@ -335,8 +335,8 @@ The following samples can be downloaded and tested:
 
 | Sample               | Document |
 | ----------------- | ------------ |
-| [MVC](https://github.com/blowdart/AspNetSameSiteSamples/tree/master/AspNetCore21MVC)  |  |
-| [Razor Pages](https://github.com/blowdart/AspNetSameSiteSamples/tree/master/AspNetCore21RazorPages)  | <security samesite="" rp21=""> | |
+| [MVC](https://github.com/blowdart/AspNetSameSiteSamples/tree/master/AspNetCore21MVC)  | <xref:security/samesite/mvc21> |
+| [Razor Pages](https://github.com/blowdart/AspNetSameSiteSamples/tree/master/AspNetCore21RazorPages)  | <xref:security/samesite/rp21> |
 
 ## December patch behavior changes