docs: fix intrapage link

diff --git a/docs/source/index.rst b/docs/source/index.rst
index e7cf947..332dad6 100644
--- a/docs/source/index.rst
+++ b/docs/source/index.rst

@@ -119,7 +119,7 @@
 		make <module_name>	
 	..
 
-		For an example of hardening a project please refer to `user_project_example <https://github.com/efabless/caravel_user_project/blob/main/docs/source/index.rst#hardening-the-user-project-using-openlane>`_
+		For an example of hardening a project please refer to :ref:`Hardening the User Project using OpenLane`.
 	
 #.  Integrate modules into the user_project_wrapper