Update docs.voltha.org release version matrix.

howot/release/repositories/
  o Document more caveats for releasing indivdiual repositories.
  o repo:ci-management must be released twice:
    - first to establish a branhc for pipeline jobs.
    - second to update dependent versions after downstream repos have been released

Change-Id: I33d7f2442a1d4ea45a48caef0e49df92988cc2ce
diff --git a/howto/release/repositories/voltha-lib-go/dependencies.rst b/howto/release/repositories/voltha-lib-go/dependencies.rst
index e1775f0..7bb7fce 100644
--- a/howto/release/repositories/voltha-lib-go/dependencies.rst
+++ b/howto/release/repositories/voltha-lib-go/dependencies.rst
@@ -2,3 +2,4 @@
 ====================
 
 - :ref:`_Release Repository ci-management`
+- :ref:`_Release Repository voltha-protos`