Merge pull request dotnet#4338 from badersur/use-xref-link

Use xref link

aspnetcore/data/ef-mvc/sort-filter-page.md

@@ -91,7 +91,7 @@ In *Views/Student/Index.cshtml*, add the highlighted code immediately before the
 
 [!code-html[](intro/samples/cu/Views/Students/Index3.cshtml?range=9-23&highlight=5-13)]
 
-This code uses the `<form>` [tag helper](https://docs.microsoft.com/aspnet/core/mvc/views/tag-helpers/intro) to add the search text box and button. By default, the `<form>` tag helper submits form data with a POST, which means that parameters are passed in the HTTP message body and not in the URL as query strings. When you specify HTTP GET, the form data is passed in the URL as query strings, which enables users to bookmark the URL. The W3C guidelines recommend that you should use GET when the action does not result in an update.
+This code uses the `<form>` [tag helper](xref:mvc/views/tag-helpers/intro) to add the search text box and button. By default, the `<form>` tag helper submits form data with a POST, which means that parameters are passed in the HTTP message body and not in the URL as query strings. When you specify HTTP GET, the form data is passed in the URL as query strings, which enables users to bookmark the URL. The W3C guidelines recommend that you should use GET when the action does not result in an update.
 
 Run the page, enter a search string, and click Search to verify that filtering is working.