Update _posts/2021-01-07-nunit-3.13.md

Co-authored-by: Mikkel Nylander Bundgaard <mikkelbu@users.noreply.github.com>

_posts/2021-01-07-nunit-3.13.md

@@ -11,4 +11,4 @@ This attribute may be applied to a test fixture (class) or to a test assembly. I
 
 This release also fixes several issues running tests in .NET 5.0. If your tests target .NET 5.0, we recommend updating to this release.
 
-You may download NUnit 3.13 from [Github](https://github.com/nunit/nunit/releases). See the [release notes](https://github.com/nunit/docs/wiki/Framework-Release-Notes) for more information.
+You may download NUnit 3.13 from [Github](https://github.com/nunit/nunit/releases). See the [release notes](https://docs.nunit.org/articles/nunit/release-notes/framework.html) for more information.