Update git submodules

* Update docs/submodules/sfc from branch 'master'
  - Nominating Manuel Buil as OPNFV SFC PTL

    Change-Id: I93165a43bc434a6ffa04334b6840823c84d27d92
    Signed-off-by: Brady Johnson <bjohnson@inocybe.ca>

diff --git a/docs/submodules/sfc b/docs/submodules/sfc
index 57e8255..d0260c5 160000 (submodule)
--- a/docs/submodules/sfc
+++ b/docs/submodules/sfc
@@ -1 +1 @@
-Subproject commit 57e82559f82e05d2cedf45e103d3dfce78592a64
+Subproject commit d0260c5d35d753e2bce23c74d877da648d47c481