Update git submodules

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

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

    tox -e docs

    Change-Id: If60809816322a1dbf0e6b9ef5f4a14db491f7a1e
    Signed-off-by: Aric Gardner <agardner@linuxfoundation.org>

diff --git a/docs/submodules/edgecloud b/docs/submodules/edgecloud
index 364189d..63c1d0f 160000 (submodule)
--- a/docs/submodules/edgecloud
+++ b/docs/submodules/edgecloud
@@ -1 +1 @@
-Subproject commit 364189da11e212f238db091ff98a016318bcb4f3
+Subproject commit 63c1d0f1b1dfc5b64f9b50f20a55e7dcc5d8ca5b