Update git submodules

* Update docs/submodules/releng from branch 'master'
  to 852d10dc09b9f2957cea208d493e963d8ecd12e8
  - Merge "nit: remove falsy duplicate"
  - nit: remove falsy duplicate

    Change-Id: I0d118ba84e0e5f56fd422ed1e51800a4cc1a8007
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index a6a9632..852d10d 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit a6a96320d6f8fb1108d3a2f1ec488e71bc4a5bfb
+Subproject commit 852d10dc09b9f2957cea208d493e963d8ecd12e8