Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Fix typos in functest-kubernetes (container names)

    Change-Id: Ieb701c9e80115a7f492f0dd80cf3603593d04e70
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index a984ebe..f250d75 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit a984ebe7ce29689cd65cb248d4bd9ea57498387f
+Subproject commit f250d75a4645c7debd409955157e570629f5b290