Update git submodules

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

diff --git a/docs/submodules/pharos b/docs/submodules/pharos
index 202aa48..c79c41c 160000 (submodule)
--- a/docs/submodules/pharos
+++ b/docs/submodules/pharos
@@ -1 +1 @@
-Subproject commit 202aa48939dd66ff312027e90ee854095b066f52
+Subproject commit c79c41cb0ed7a4749bbf2e1261b73bce12c7b802