Update git submodules

* Update docs/submodules/armband from branch 'stable/euphrates'
  - Update release date in documentation

    Change-Id: I294b2ccb9e43f90aa3745fe040a7c956f910b816
    Signed-off-by: Cristina Pauna <cristina.pauna@enea.com>
    (cherry picked from commit 41fd911de4f0c302f44c9a3af12aebc852dfffc8)

diff --git a/docs/submodules/armband b/docs/submodules/armband
index a1e421d..9c944c3 160000 (submodule)
--- a/docs/submodules/armband
+++ b/docs/submodules/armband
@@ -1 +1 @@
-Subproject commit a1e421da5e038224f6950c3c15444d98d67f4782
+Subproject commit 9c944c3aaf78360f47a8bf845c1dda0079fa3fc4