Update git submodules

* Update docs/submodules/releng from branch 'master'
  - jjb: xci: Do not check for scenario changes in releng-xci repo

    There are no scenarios in releng-xci anymore so we must not try and
    determine the impacted scenario. Using the default one is good enough
    for CI. Users can still override the defaults using the usual methods.

    Change-Id: I47207ebddae79fd89615bfd664f211879aabae92
    Signed-off-by: Markos Chandras <mchandras@suse.de>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 4f9c2dd..5d84427 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 4f9c2dd1172ae6f87e607f4bf8c6d63803b1db19
+Subproject commit 5d844275d78eadc405058b61c291577635c94339