Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "Enable Daisy Euphrates merge jobs"
  - Enable Daisy Euphrates merge jobs

    Change-Id: Iaa278fa1d0aa3faa8735bc45159031d04d997a6f
    Signed-off-by: Alex Yang <yangyang1@zte.com.cn>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index d1a4d4a..994a8c5 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit d1a4d4ac00500b781e1e17f65d39db181177af37
+Subproject commit 994a8c5d5c4bad0d5920851ca435bfef04dd2de4