Update git submodules

* Update docs/submodules/fuel from branch 'stable/euphrates'
  - Merge "[baremetal] SaltStack Deployment Documentation" into stable/euphrates
  - [baremetal] SaltStack Deployment Documentation

    Generate documentation automatically using `reclass-doc`.
    nginx is already configured to serve said documentation on
    proxy's public VIP on port 8090.

    Change-Id: If2aef646a0ec44d5cc7e9d425e565e5c0aa581b3
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>
    (cherry picked from commit f3a355d5644a7271d9df0a48febc3a93cceddb8e)

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index 0e05daa..302af37 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit 0e05daaf5e70f3980beda57bfadbff52adca16cb
+Subproject commit 302af377cbe7a68da3a0f52eb7ffea3f27dddb52