Update git submodules

* Update docs/submodules/fuel from branch 'master'
  - [baremetal] cmp linux.system: catch 'no response'

    Catch & retry transient errors / timeouts while applying the
    `linux.system` state on cmp nodes.

    Change-Id: Id314b5a29673e0bcaa78611fc787491056830952
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index 3d6c332..67b7248 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit 3d6c3323256d6dde62ea335e53427410f730a192
+Subproject commit 67b7248e3cc8550ebd757ebb48e2536770f073f8