Add release notes

Closes-Bug: CLOUDOPS-761
Change-Id: If1aa57c0e1617a312f36e52c503a40b5ee166c91
(cherry picked from commit 7607e5a65486453e80b1a7a042051df61e672301)
diff --git a/doc/source/index.rst b/doc/source/index.rst
index 2f26821..9703ada 100644
--- a/doc/source/index.rst
+++ b/doc/source/index.rst
@@ -28,6 +28,7 @@
    config/index
    deploy/index
    admin/index
+   release-notes