Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "armband: Enable docker build/push for yardstick"
  - armband: Enable docker build/push for yardstick

    Change-Id: I33f719578baadc70571832c5b7e7f146516c3020
    Signed-off-by: Catalina Focsa <catalina.focsa@enea.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 968e355..a6bc65d 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 968e355bd240d4a64f1aa0076c6eaba400e233bd
+Subproject commit a6bc65d1efa18f56183c67035a77b616737212ec