Update git submodules

* Update docs/submodules/moon from branch 'master'
  - Fix bugs due to the modification of python_moondb

    Change-Id: Id3855a6e8da9f8ef942c7a34a3e8da4f87be4c9e

diff --git a/docs/submodules/moon b/docs/submodules/moon
index acb811a..d425d4e 160000 (submodule)
--- a/docs/submodules/moon
+++ b/docs/submodules/moon
@@ -1 +1 @@
-Subproject commit acb811aafc97d60cdcc71e0b9b2466fb00bfb097
+Subproject commit d425d4edf13ed389cd34113bd9fd78eaa0a08c20