VOL-4840 - Tracing ticket for release documentation.

release_notes/voltha_2.11.rst
-----------------------------
  o Version string updates for a few released components.

howto/release/index.rst
howto/release/components/index.rst
----------------------------------

howto/release/preparation.rst
howto/release/components/onos_dependencies.rst
----------------------------------------------
  o Begin documenting the variant release process for onos components.
  o ONOS publishes builds through maven central -vs- github and tags.

Misc text edits within documents to improve clarity.

Change-Id: Ib1179a1a9ea7c9c6e02f40644ab29fbbd7a83443
diff --git a/howto/release/index.rst b/howto/release/index.rst
index d98e421..da347a5 100644
--- a/howto/release/index.rst
+++ b/howto/release/index.rst
@@ -3,6 +3,8 @@
 .. toctree::
    :maxdepth: 2
 
+   components/index
+
    voltctl/index
    voltctl/install
    voltctl/release