Update link

docs/guides/build-using-too-many-resources.rst

@@ -49,6 +49,6 @@ There are a few libraries that Read the Docs has already installed (scipy, numpy
 in the Docker image used to build your docs. You can check the updated list of pre-installed libraries in the `Docker image repository`_.
 
 To use these pre-installed libraries and avoid consuming time re-downloading/compiling them,
-you can use the :ref:`yaml-config:python.use_system_site_packages` option to have access to them.
+you can use the :ref:`config-file/v2:python.system_packages` option to have access to them.
 
 .. _Docker image repository: https://github.com/rtfd/readthedocs-docker-images