Update git submodules

* Update docs/submodules/fuel from branch 'master'
  - Merge "[state] Stop expecting linux.network failures"
  - [state] Stop expecting linux.network failures

    Now that the `linux.network` state applies cleanly on all nodes,
    stop expecting failures to prevent false-positive passes.

    Change-Id: I8a283474e12b85deb95815e4e7a0af4a74d143ac
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index 79e32c8..81dad2b 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit 79e32c8cc5631204d2e5b0b328c954a2a2197037
+Subproject commit 81dad2be6c0851bea9a06841a26ea26ea3c7a82f