Update git submodules

* Update docs/submodules/fuel from branch 'master'
  - [patch] Rebase keyserver proxy support

    Rebase on top of [1].

    [1] https://github.com/salt-formulas/salt-formula-linux/commit/6f5e69e

    Change-Id: Ic34bb9c1fad8778262f2e876c91667e903d143bf
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index 5bef2b9..79e32c8 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit 5bef2b99e26c798eb0a5deb3010662eeb941344b
+Subproject commit 79e32c8cc5631204d2e5b0b328c954a2a2197037