Update git submodules

* Update docs/submodules/releng from branch 'master'
  - [daisy] Run fraser jobs on zte-pod3

    Change-Id: I4b879b6af9b4633a8444db988b3fbe7aa1690ee8
    Signed-off-by: Alex Yang <yangyang1@zte.com.cn>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 7c0d98f..6cd969c 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 7c0d98f1f5811ac15cdc043621530fa89f297615
+Subproject commit 6cd969c1abf6ef04a21430c2acaadbd969838d3e