Update git submodules

* Update docs/submodules/promise from branch 'stable/euphrates'
  - Update Config Guide

    Change-Id: Ibac4f47889ec0d0349d29eaffb61bcf070d99eb3
    Signed-off-by: Bertrand Souville <souville@docomolab-euro.com>
    (cherry picked from commit b121b21df581291cd273a9a8acc1d4f266116022)

diff --git a/docs/submodules/promise b/docs/submodules/promise
index bda9a08..0a36133 160000 (submodule)
--- a/docs/submodules/promise
+++ b/docs/submodules/promise
@@ -1 +1 @@
-Subproject commit bda9a08250f6a845317284960f33a97a0397686f
+Subproject commit 0a36133326cfe8836b81780cf0ff42ad4021a20f