Update git submodules

* Update docs/submodules/fuel from branch 'master'
  - Merge "AArch64: Switch jumpserver VMs to virtio video"
  - AArch64: Switch jumpserver VMs to virtio video

    Drop vgabios dependency by switching video from VGA to virtio for
    all VMs spawned on the jumpserver.

    NOTE: This requires virtualization packages on the jumpserver to be
    up to date (e.g. libvirt, QEMU).

    JIRA: ARMBAND-306

    Change-Id: I73913e1ae8584f4e73b92994f78f7ec363cba3ec
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index 84dc774..ab9d5af 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit 84dc7744f0b07ce4b9ae1f214bfdda2872122d62
+Subproject commit ab9d5af063c243d3201b9405f8781515a08ce0f3