Update git submodules

* Update docs/submodules/pharos from branch 'master'
  - Merge "Encrypt ipmi info of zte baremetal pods"
  - Encrypt ipmi info of zte baremetal pods

    Change-Id: I86935bee9ff30d811f0e756f93716cb415fa3a01
    Signed-off-by: Alex Yang <yangyang1@zte.com.cn>

diff --git a/docs/submodules/pharos b/docs/submodules/pharos
index 5feefb8..3b881de 160000 (submodule)
--- a/docs/submodules/pharos
+++ b/docs/submodules/pharos
@@ -1 +1 @@
-Subproject commit 5feefb8a2b6d5723b72797e9574bed4ebb3574c6
+Subproject commit 3b881de152bf5bc8ced6260406056bad397085fe