Update git submodules

* Update docs/submodules/fuel from branch 'stable/euphrates'
  - Merge "patches: pharos: Dynamic PXE interface index" into stable/euphrates
  - patches: pharos: Dynamic PXE interface index

    Change-Id: I7eae35c2e040cf316af45fd420ba6611abb2fa4b
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>
    (cherry picked from commit a1a73087d8e5cb43d2ebcf313f7a784b20bc4a3e)

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index a9e172b..f33cdac 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit a9e172b43c5ab17b1c1971dbb6fccf2e66bbe520
+Subproject commit f33cdac73506ceb2093c9360bcff6a0f08472ad5