Update git submodules

* Update docs/submodules/armband from branch 'stable/euphrates'
  - u/fuel: Bump & rebase for curtin network config

    Change-Id: Iaaea7494b960b05c4e409eb52daa6b0fa6414e12
    Signed-off-by: Charalampos Kominos <Charalampos.Kominos@enea.com>
    (cherry picked from commit 00d1b6b2e00803bcb3901b181ec7d97e8062f677)

diff --git a/docs/submodules/armband b/docs/submodules/armband
index f02e642..abfef7b 160000 (submodule)
--- a/docs/submodules/armband
+++ b/docs/submodules/armband
@@ -1 +1 @@
-Subproject commit f02e6423174aec5cce72ca209be9aec2f5562369
+Subproject commit abfef7b5acc25201d263e68e61ef01c375818bc9