Update c_sharp_basics.rst (MonoDevelop has been abandoned)

MonoDevelop has officially been retired 4 years ago on github (https://github.com/mono/monodevelop)

tutorials/scripting/c_sharp/c_sharp_basics.rst

@@ -60,7 +60,7 @@ Configuring an external editor
 
 C# support in Godot's built-in script editor is minimal. Consider using an
 external IDE or editor, such as  `Visual Studio Code <https://code.visualstudio.com/>`__
-or MonoDevelop. These provide autocompletion, debugging, and other
+or `Visual Studio <https://visualstudio.microsoft.com/>`__. These provide autocompletion, debugging, and other
 useful features for C#. To select an external editor in Godot,
 click on **Editor → Editor Settings** and scroll down to
 **Dotnet**. Under **Dotnet**, click on **Editor**, and select your