Fix incorrect link

getting_started/step_by_step/instancing.rst

@@ -113,4 +113,4 @@ Conclusion
 
 Instancing can be useful when you want to create many copies of the
 same object. It is also possible to create instances in code by using
-GDScript, see :ref:`doc_scripting_continued`.
+GDScript, see :ref:`doc_instancing_continued`.