Update git submodules

* Update docs/submodules/releng from branch 'master'
  to 3443bbdf28675dd08147ef851aefbff81b92d0bb
  - Merge "Stable branch for edgecloud"
  - Stable branch for edgecloud

    On behalf of Qihui

    Signed-off-by: Aric Gardner <agardner@linuxfoundation.org>
    Change-Id: I1a7970c89bed98315a40f392854c76b08283c04b

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 53faa1e..3443bbd 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 53faa1e5489b23d225c7430f33c2befd39bc9223
+Subproject commit 3443bbdf28675dd08147ef851aefbff81b92d0bb