Update git submodules

* Update docs/submodules/sfc from branch 'master'
  - Merge "Fix links to remove references to submodules"
  - Fix links to remove references to submodules

    All references to submodules must be removed for docs to
    work going forward.

    Can be tested once your project has a local tox file

    Change-Id: I8953e7bece19cb5ab733ce15733e4668ca8d6bc1
    Signed-off-by: Aric Gardner <agardner@linuxfoundation.org>

diff --git a/docs/submodules/sfc b/docs/submodules/sfc
index 084ae51..50de8b6 160000 (submodule)
--- a/docs/submodules/sfc
+++ b/docs/submodules/sfc
@@ -1 +1 @@
-Subproject commit 084ae518236709071f04f3d6e750f0821c3e51bb
+Subproject commit 50de8b62331afc6ddd3bbc2707943386dc4c753c