Update git submodules

* Update docs/submodules/releng from branch 'master'
  - jjb: xci: Ensure GERRIT_TOPIC is always set

    Fixes the following problem

    [description-setter] Description set: Scenario: os-nosdn-nofeature | Node: intel-virtual14
    [xci-verify-ubuntu-healthcheck-virtual-master] $ /bin/bash /tmp/jenkins7521920744845291696.sh
    /tmp/jenkins7521920744845291696.sh: line 21: GERRIT_TOPIC: unbound variable
    Build step 'Execute shell' marked build as failure

    Change-Id: Iddf82e6ae6c6c433d941c461953c11935bc45269
    Signed-off-by: Markos Chandras <mchandras@suse.de>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index f66a725..cab3941 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit f66a725f537e04266725669b47bf59cab35d7b47
+Subproject commit cab3941aa6d98312f0a26a31582999e21e39528a