Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Storperf Parallel Verify Jobs

    To ensure these run in parallel they need to all be part of the same
    phase, and the phase needs to be marked as parallel.

    Change-Id: Ib1c1d9e433d925c36371500039da30251469b5fb
    Signed-off-by: Trevor Bramwell <tbramwell@linuxfoundation.org>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 24ac8ee..9a66e8d 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 24ac8ee3d10616bb86295d9a9836b010104ff788
+Subproject commit 9a66e8de97623ab068b68dc0649331fc8f632e6c