Update git submodules

* Update docs/submodules/promise from branch 'stable/euphrates'
  - Fixed typo

    Change-Id: I6746446acd915c853bf493f444a96a1c04590f19
    Signed-off-by: Bertrand Souville <souville@docomolab-euro.com>
    (cherry picked from commit 30125bcaa029df296a2dd2b214774e36ec995a24)

diff --git a/docs/submodules/promise b/docs/submodules/promise
index 4b9d723..bda9a08 160000 (submodule)
--- a/docs/submodules/promise
+++ b/docs/submodules/promise
@@ -1 +1 @@
-Subproject commit 4b9d723b6e6e368536d43c8f511e6eeb35c7f27a
+Subproject commit bda9a08250f6a845317284960f33a97a0397686f