Update git submodules

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

    Change-Id: Iad2502e876600ba966a38f2df3e71bd579f80e8f
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index a1c39db..6269b9f 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit a1c39dbc47a77f80c59358158810664cbc44ea56
+Subproject commit 6269b9ffce8c730eba2a4037075484e007c010b8