Update git submodules

* Update docs/submodules/sfc from branch 'master'
  - xci: Lowercase ansible variables

    Change-Id: I35960abdab146ab2f80a1ad160489ee4877d42e4
    Signed-off-by: Fatih Degirmenci <fdegir@gmail.com>

diff --git a/docs/submodules/sfc b/docs/submodules/sfc
index 7524284..9dda531 160000 (submodule)
--- a/docs/submodules/sfc
+++ b/docs/submodules/sfc
@@ -1 +1 @@
-Subproject commit 752428421637d40833ff68647cdbbe58809a643f
+Subproject commit 9dda531e8e9be93b930b89d45a395085fbcb61cc