Update git submodules

* Update docs/submodules/armband from branch 'stable/euphrates'
  - p/fuel: AArch64: base image: salt-minion preinst

    Change-Id: Ib22a92d3530e14d1b9e002507c73a5960d5b058e
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>
    (cherry picked from commit 33a056fd1d2154fdd9779dbed0e001d45747680f)

diff --git a/docs/submodules/armband b/docs/submodules/armband
index b49021e..dc2ea6b 160000 (submodule)
--- a/docs/submodules/armband
+++ b/docs/submodules/armband
@@ -1 +1 @@
-Subproject commit b49021e1227573fbde13c82f432635ef187b1e83
+Subproject commit dc2ea6bbe10209d746577097b42c8c6007cd1aaf