Update git submodules

* Update docs/submodules/sfc from branch 'master'
  - Add latest_release as default

    If nothing is specified, let's deploy with the latest release which
    we know works correctly

    Change-Id: Ia38e4b5e5c32b886dfdd5ab76654241b495d6863
    Signed-off-by: Manuel Buil <mbuil@suse.com>

diff --git a/docs/submodules/sfc b/docs/submodules/sfc
index 19e1907..b392a77 160000 (submodule)
--- a/docs/submodules/sfc
+++ b/docs/submodules/sfc
@@ -1 +1 @@
-Subproject commit 19e1907a59b4096be7edca7ccdbcf02252004325
+Subproject commit b392a77efbd543495422555f6736d5734e482413