Change TUnit Documentation URL (#45560)

Author: thomhurst

docs/core/testing/microsoft-testing-platform-intro.md

@@ -41,7 +41,7 @@ The main driving factors for the evolution of the new testing platform are detai
 * MSTest. In MSTest, the support of `Microsoft.Testing.Platform` is done via [MSTest runner](unit-testing-mstest-runner-intro.md).
 * NUnit. In NUnit, the support of `Microsoft.Testing.Platform` is done via [NUnit runner](unit-testing-nunit-runner-intro.md).
 * xUnit.net: In xUnit.net, the support of `Microsoft.Testing.Platform` is done via [xUnit.net runner](https://xunit.net/docs/getting-started/v3/microsoft-testing-platform).
-* TUnit: entirely constructed on top of the `Microsoft.Testing.Platform`, for more information, see [TUnit documentation](https://thomhurst.github.io/TUnit/).
+* TUnit: entirely constructed on top of the `Microsoft.Testing.Platform`, for more information, see [TUnit documentation](https://tunit.dev/).
 
 ## Run and debug tests