Update git submodules

* Update docs/submodules/fuel from branch 'master'
  - [baremetal] Fix maas_subnets without maas_fabrics

    Change-Id: I603b39d46d3f2f2448b8f9746ad0745e416bbee7
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index e92a846..2c48915 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit e92a846313d0ff7a1b0b75e1551fd053621a921d
+Subproject commit 2c48915a1a77aa3ac0133155fd0cdadbf280493d