Update git submodules

* Update docs/submodules/pharos from branch 'master'
  - Local Documentation Builds

    This adds configuration for performing local documentation builds
    with the following simple command:

    tox -e docs

    Change-Id: Ib0d60d9f458b19dd5e77de962d34c1d299de7b16
    Signed-off-by: Aric Gardner <agardner@linuxfoundation.org>

diff --git a/docs/submodules/pharos b/docs/submodules/pharos
index af1b29c..ca6c6e7 160000 (submodule)
--- a/docs/submodules/pharos
+++ b/docs/submodules/pharos
@@ -1 +1 @@
-Subproject commit af1b29c7d9a02c35e10fd36d3c1fc88ba0192035
+Subproject commit ca6c6e7ef7c5fe463a8df66dcf741728b35dad62