Update git submodules

* Update docs/submodules/moon from branch 'master'
  - Update index in the doc tree.

    Change-Id: I30799e966aafd502cc7c134f908c367e65914960

diff --git a/docs/submodules/moon b/docs/submodules/moon
index 2a6a024..f2f75ef 160000 (submodule)
--- a/docs/submodules/moon
+++ b/docs/submodules/moon
@@ -1 +1 @@
-Subproject commit 2a6a0241e1c40e95c6782513dd99d437ebf73c62
+Subproject commit f2f75ef07b5e5495973e5af82b3e9a43619e0cc3