Update git submodules

* Update docs/submodules/pharos from branch 'master'
  - Merge "[fuel] Add MaaS PXE network to installer adapter"
  - [fuel] Add MaaS PXE network to installer adapter

    JIRA: FUEL-313

    Change-Id: I046ea732e1047f793f1b3bc6f7fc31cfcee9ff40
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>

diff --git a/docs/submodules/pharos b/docs/submodules/pharos
index b40dbb2..a24e1a7 160000 (submodule)
--- a/docs/submodules/pharos
+++ b/docs/submodules/pharos
@@ -1 +1 @@
-Subproject commit b40dbb24ff47979ce6b795f37482193fd6d99c0a
+Subproject commit a24e1a788afd96f8ce4ee2f3b4d888d7e39dfce1