Update git submodules

* Update docs/submodules/pharos from branch 'stable/euphrates'
  - Merge "[fuel] Use PXE interface index from net_config" into stable/euphrates
  - [fuel] Use PXE interface index from net_config

    Instead of assuming the PXE network interface is always the first,
    read its index from 'net_config' section.

    Change-Id: I0b4e9fc89297f4bd718a2e5336746917347c89e1
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>
    (cherry picked from commit 30ce269378cefdd14377c838687c4052d8c7e55d)

diff --git a/docs/submodules/pharos b/docs/submodules/pharos
index 771ea33..08d4886 160000 (submodule)
--- a/docs/submodules/pharos
+++ b/docs/submodules/pharos
@@ -1 +1 @@
-Subproject commit 771ea333aff9847eb69a5360e64c1779ca1db1df
+Subproject commit 08d4886286298a669af2025c995799a3896c4313