add missing redirect

Author: adamsitnik

.openpublishing.redirection.fundamentals.json

@@ -192,6 +192,10 @@
             "source_path_from_root": "/docs/standard/commandline/use-middleware.md",
             "redirect_url": "/dotnet/standard/commandline/migration-guide-2.0.0-beta5#configuration"
         },
+        {
+            "source_path_from_root": "/docs/standard/commandline/tab-completion.md",
+            "redirect_url": "/dotnet/standard/commandline/how-to-enable-tab-completion"
+        },
         {
             "source_path_from_root": "/docs/fundamentals/networking/httpclient-guidelines.md",
             "redirect_url": "/dotnet/fundamentals/networking/http/httpclient-guidelines"