Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "[stable/gambia] fuel, armband stable branches"
  - [stable/gambia] fuel, armband stable branches

    Change-Id: I21e6464478fd943037b16af8758f6b24bc54f0fc
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index be58bd4..2d52241 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit be58bd44cf41c4c07467040795b9393a194765cb
+Subproject commit 2d52241bd05ff258d3441370ed3b0841ebf98873