Update git submodules

* Update docs/submodules/releng from branch 'master'
  to b99f9fa560c8ce8a90cd3f4f06669380a19a2ffd
  - Revert "Add podman via Debian container"

    host is too old right now

    This reverts commit 34948706b7c1262d21ce03f36607124bfe880e60.

    Change-Id: Ifa62577a84f5d74a94570daaa35d1477ffaf2ab8
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 3494870..b99f9fa 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 34948706b7c1262d21ce03f36607124bfe880e60
+Subproject commit b99f9fa560c8ce8a90cd3f4f06669380a19a2ffd