Update git submodules

* Update docs/submodules/pharos from branch 'master'
  - Fix trailing spaces issue when generates yml files

    There are some missing coniguration in jinja2 template, which will cause
    the trailing spaces issues. Currently just add some comments in the end.

    Change-Id: I4fe250cda1192d7c6e7cead0251ac5e7978cd310
    Signed-off-by: Julien <zhang.jun3g@zte.com.cn>
  - Fail to set the value in multiple lines

    refer to the log of Jenkins:
    https://build.opnfv.org/ci/view/pharos/job/
    validate-pdf-jinja2-templates-master/326/console

    /home/jenkins-ci/opnfv/slave_root/workspace/
    validate-pdf-jinja2-templates-master/config/utils/check-jinja2.sh:
    line 54: -i ./config/installers/apex: No such file or directory

    [GENERATE] [OK]
    [YAMLLINT] [OK] yamllint -s ./config/installers/apex/pod_config.yaml

    Change-Id: I13c220e7fba5355124ae2b41e7399140c5d92523
    Signed-off-by: Julien <zhang.jun3g@zte.com.cn>

diff --git a/docs/submodules/pharos b/docs/submodules/pharos
index 406aac8..66786e0 160000 (submodule)
--- a/docs/submodules/pharos
+++ b/docs/submodules/pharos
@@ -1 +1 @@
-Subproject commit 406aac8b13ccb9d0d01c3daa8359a3903d937a9c
+Subproject commit 66786e0de4a2edf4dfce2596d4c0e6f5ec844e24