Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Remove useless check_deployment

    It's unused and it depends on snaps.

    Change-Id: Id31c45d015b3a196ecfb3a5f49e3d7504df992be
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 5a8b24d..77a5474 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 5a8b24d2ae0c157cfbd0dd2ec0f5d1145e60c46a
+Subproject commit 77a5474e7c987e282a2d6f02a0eaebc470722a52