Update git submodules

* Update docs/submodules/armband from branch 'stable/euphrates'
  - docs: armband: stable: Jumpserver min libvirt version

    This is a copy of installation.instruction.rst
    from fuel to armband repo on stable/euphrates branch

    JIRA: ARMBAND-337

    Change-Id: I19cf30c3074f87d0067bc91157930970f5965237
    Signed-off-by: ting wu <ting.wu@enea.com>

diff --git a/docs/submodules/armband b/docs/submodules/armband
index b7763f1..1c1cd04 160000 (submodule)
--- a/docs/submodules/armband
+++ b/docs/submodules/armband
@@ -1 +1 @@
-Subproject commit b7763f1c1e13d70d285f7697323f5419c89b2625
+Subproject commit 1c1cd04959057f18cf8dc4f0331def50f0066442