Update git submodules

* Update docs/submodules/fuel from branch 'master'
  - [submodule] Bump Pharos git repo for IDF updates

    Change-Id: I8d526d51a3e18652c59bad9d7c3c384aa6583566
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index a2062e5..8387dd4 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit a2062e5fd64a2737df44497bfcece7e804b7f5bf
+Subproject commit 8387dd44747d3e17269289c096edaecdaaee573a