Update git submodules

* Update docs/submodules/pharos from branch 'master'
  - [fuel] Assign public network to proxy nodes

    Change-Id: I8d4cc9505eb1d405b8f6a3ef1053249d803bda7b
    Signed-off-by: Michael Polenchuk <mpolenchuk@mirantis.com>

diff --git a/docs/submodules/pharos b/docs/submodules/pharos
index 2c4fac2..af9e2a9 160000 (submodule)
--- a/docs/submodules/pharos
+++ b/docs/submodules/pharos
@@ -1 +1 @@
-Subproject commit 2c4fac2e41aaca9dd679b200ffc968eeb448b395
+Subproject commit af9e2a904ad7f1e44ba26cf9cebbc8bb3f7d8842