Update git submodules

* Update docs/submodules/releng from branch 'master'
  to 5ec9777d5f756cf82987b2e47b15956f0e0d7ebd
  - Makes the job easy to reuse vs ubuntu 22.04

    Change-Id: I540da190d0f8a3004b51eba0ed838ef8fb73fec4
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index ee49233..5ec9777 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit ee49233d53af625a4601022ea60550c5a497caae
+Subproject commit 5ec9777d5f756cf82987b2e47b15956f0e0d7ebd