Update git submodules

* Update docs/submodules/fuel from branch 'stable/euphrates'
  - states: maas: Dynamic node count in stop condition

    Change-Id: I7fe8d0c77a1d62e2214fb1089651a639303dd20e
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>
    Signed-off-by: Michael Polenchuk <mpolenchuk@mirantis.com>
    (cherry picked from commit ed3404128c71d145ed2c697b6b15ea6d016c7550)

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index 53282e1..79af134 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit 53282e13c6c3937f5a3b9e91e72104252a38762f
+Subproject commit 79af1346fdd99e2186c45b2fd696d4ed6feb91cf