Update git submodules

* Update docs/submodules/releng from branch 'master'
  to fdef7fe278aa085952338a1973d03622feb56319
  - Add docker if RockyLinux

    Change-Id: I12c78706b6562e25bb54c1a7692f979704b67bd2
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 45b1ab3..fdef7fe 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 45b1ab39d85dcda240fbacc538a21ee667d3eaf9
+Subproject commit fdef7fe278aa085952338a1973d03622feb56319