Update git submodules

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

    Change-Id: I294b2ccb9e43f90aa3745fe040a7c956f910b816
    Signed-off-by: Cristina Pauna <cristina.pauna@enea.com>

diff --git a/docs/submodules/armband b/docs/submodules/armband
index d4dd2e9..41fd911 160000 (submodule)
--- a/docs/submodules/armband
+++ b/docs/submodules/armband
@@ -1 +1 @@
-Subproject commit d4dd2e997a4af3ed0dfc74dfb964e07ed7225d05
+Subproject commit 41fd911de4f0c302f44c9a3af12aebc852dfffc8