Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "Fix functest k8s job"
  - Fix functest k8s job

    Change-Id: Ied442837e4e9fd25946590d3dbada6ff2cbe7fc3
    Signed-off-by: Linda Wang <wangwulin@huawei.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index d68216e..91fdca4 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit d68216e49d65ebbbb386d5e8906a51374c03b31a
+Subproject commit 91fdca46210a711efd88fc8ebbf0fd1f65ea90c5