Update git submodules

* Update docs/submodules/releng from branch 'master'
  to 686cb258d6c9b6c2f60836a60b49835ab2c4e8cd
  - Merge "typo ""
  - typo "

    Change-Id: Ib6d61779fdd75b915b5530ccd0297aff511ffe92
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 014256e..686cb25 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 014256ec73458eb5fb9fe544084f00d584118283
+Subproject commit 686cb258d6c9b6c2f60836a60b49835ab2c4e8cd