Change osa link to be intersphinx type

Issue-ID: CIMAN-376
Signed-off-by: Aric Gardner <agardner@linuxfoundation.org>
Change-Id: I397a319812bca1f34bf6b56e93b877deb3a453f3
diff --git a/docs/release/index.rst b/docs/release/index.rst
index 453d7c1..43e8389 100644
--- a/docs/release/index.rst
+++ b/docs/release/index.rst
@@ -48,12 +48,7 @@
 Security Notes
 ==============
 Details about discovered and mitigated vulnerabilities are in
-:ref:`ONAP Security <onap-security>`
-
-.. toctree::
-   :hidden:
-
-   ../submodules/osa.git/docs/index.rst
+:ref:`ONAP Security <onap-osa:onap-security>`
 
 ONAP has adopted the `CII Best Practice Badge Program <https://bestpractices.coreinfrastructure.org/en>`_.