Update git submodules

* Update docs/submodules/releng from branch 'master'
  to 0618bc81c0489815e5ed44a9bec226727e83b911
  - Removes falsy link check

    It was not the root cause.

    Change-Id: Ib9decdfeaa29f093aee285a0d68c259ec95982d3
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 8dc895a..0618bc8 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 8dc895a15ce26fee7c86fb47a0ba3511971f4431
+Subproject commit 0618bc81c0489815e5ed44a9bec226727e83b911