Add release notes anchor

Add release notes anchor to release notes template

Issue-ID: DOC-631
Signed-off-by: Dan Timoney <dtimoney@att.com>
Change-Id: Ie639d88421d6470ecc2b46f1e934f2920e10a4ff
diff --git a/docs/templates/sections/release-notes.rst b/docs/templates/sections/release-notes.rst
index 980d59a..99eb015 100644
--- a/docs/templates/sections/release-notes.rst
+++ b/docs/templates/sections/release-notes.rst
@@ -2,6 +2,7 @@
    International License.
 .. http://creativecommons.org/licenses/by/4.0
 .. (c) ONAP Project and its contributors
+.. _release_notes:
 
 ***********************
 <project> Release Notes