Update git submodules

* Update docs/submodules/moon from branch 'master'
  - use the threading capability of Flask app; set the number of manager to 1

    Change-Id: Ia700f83898de33372c52969f774ee8aa642ee36c

diff --git a/docs/submodules/moon b/docs/submodules/moon
index 7332613..8c4396c 160000 (submodule)
--- a/docs/submodules/moon
+++ b/docs/submodules/moon
@@ -1 +1 @@
-Subproject commit 73326131f58c5ca208cd54025e12ee9de543d4a7
+Subproject commit 8c4396c505ea245af4a542cf87b185a010484f5f