Fix links to new intersphinx format.

Now that all the projects have anchors.
convert links to intersphinx format

Issue-ID: CIMAN-376
Signed-off-by: Aric Gardner <agardner@linuxfoundation.org>
Change-Id: I9c97ba7f6809446402cc2fa08add67a771e7e0fe
diff --git a/docs/guides/onap-developer/how-to-use-docs/addendum.rst b/docs/guides/onap-developer/how-to-use-docs/addendum.rst
index ba35dcc..e3b209c 100644
--- a/docs/guides/onap-developer/how-to-use-docs/addendum.rst
+++ b/docs/guides/onap-developer/how-to-use-docs/addendum.rst
@@ -102,7 +102,7 @@
 you created in the source RST.
 
 These are simple cases with simple options. For more information about indexing with Sphinx,
-please see the `official Sphinx documentation <http://www.sphinx-doc.org/en/stable/markup/misc.html#directive-index>`_.
+please see the `official Sphinx documentation <http://www.sphinx-doc.org/en/stable/markup/misc.html>`_.
 
 
 Jenkins Jobs