Update git submodules

* Update docs/submodules/fuel from branch 'master'
  - [virsh net] Fix virtual node check for public net

    Jinja variables set inside loops do not live outside current
    iteration, so use a dictionary.update to work around that.

    Fixes: 3d2c66e

    Change-Id: I2bef64dddab080486a71952465edc4e528ae9e17
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index f78cd79..fac7709 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit f78cd791f2529b571152e634aa9141ab993d723e
+Subproject commit fac7709ee330362399ddbb2c783f4655ab14442d