Update git submodules

* Update docs/submodules/promise from branch 'master'
  - Remove numbering

    Change-Id: Ia96a2761dc5a44a48e35816b7adb28222a962adc
    Signed-off-by: Gerald Kunzmann <kunzmann@docomolab-euro.com>

diff --git a/docs/submodules/promise b/docs/submodules/promise
index 927078e..41c8034 160000 (submodule)
--- a/docs/submodules/promise
+++ b/docs/submodules/promise
@@ -1 +1 @@
-Subproject commit 927078e6569121789e3e488d1599c6c1f30fcf8b
+Subproject commit 41c803455971d76e7a6d8cd9cde3371525138db9