Update git submodules

* Update docs/submodules/releng from branch 'master'
  to a42e670c3dcebc19c125f2173790fc5a0d0794e5
  - Prepare Functest Kubernetes v1.25

    Change-Id: I6ce6983f2057a831713a3379b5686de3fcae892a
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index e53a85c..a42e670 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit e53a85c67d988af36ac4e510fb0172e51986eeb7
+Subproject commit a42e670c3dcebc19c125f2173790fc5a0d0794e5