Update git submodules

* Update docs/submodules/releng from branch 'master'
  to 9604f5145ba3614e2255db9cccf20dd2973ccd5c
  - Fix incorrect url

    Change-Id: I6d78c48d0fb010b698ac0cb73e0aded79269218a
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index fc48c86..9604f51 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit fc48c863d6dc5eae21a2f8b5906f5c135f5864bd
+Subproject commit 9604f5145ba3614e2255db9cccf20dd2973ccd5c