Update git submodules

* Update docs/submodules/fuel from branch 'stable/euphrates'
  - patches: pharos: Bump & drop upstream patches

    All our staged patches for Pharos repo are now upstream, so bump
    the git submodule and remove the patch files.

    Change-Id: I0d68eb3bdd9abfa286c3640acc1f13ce6100801d
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>
    (cherry picked from commit 33d945e3045f68ea7cbd2f1b8d01618cb3fed23c)

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index 08d51f3..9ec36b4 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit 08d51f365efe1359688307aac726ecab2b8fdfea
+Subproject commit 9ec36b4c0483c64d4cd89d0dafe8ae02d20fba87