Update git submodules

* Update docs/submodules/releng from branch 'master'
  to 1994abc5f75d7e15400b01ef893d3bce9ca8e7d7
  - Prepare Functest Kubernetes 1.31

    Change-Id: I932815c47f4264f6e1a933cb23b09e1fda384899
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 18ba5a4..1994abc 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 18ba5a46ee185edf64d0724f20a4d924bd9afc73
+Subproject commit 1994abc5f75d7e15400b01ef893d3bce9ca8e7d7