Update git submodules

* Update docs/submodules/fuel from branch 'master'
  - Align salt version & repos

    Change-Id: If7cb8473f5c290d1d5f22fce5567f7b8da24fd9f
    Signed-off-by: Michael Polenchuk <mpolenchuk@mirantis.com>

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index fa63bf2..0c00f81 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit fa63bf2a6afe2c2139ae9161fd995d54df70fd68
+Subproject commit 0c00f813d709fd1b65e5dd52abcf16fd81b3d0e1