Update git submodules

* Update docs/submodules/sfc from branch 'master'
  - Adding Dimitris as a committer

    Dimitris has been helping a lot in the 2 previous releases. This last release
    has proven that he is essential to the project adding features like
    multi-installer support and helping debug SFC in both APEX and xci. That's
     why I think he should become committer in the OPNFV-SFC project

    Change-Id: I727e3e4e34b9b8aee24cd2b85af23fe97d601278
    Signed-off-by: Manuel Buil <mbuil@suse.com>

diff --git a/docs/submodules/sfc b/docs/submodules/sfc
index 6d8858f..05e931a 160000 (submodule)
--- a/docs/submodules/sfc
+++ b/docs/submodules/sfc
@@ -1 +1 @@
-Subproject commit 6d8858f8086749e380f86b4a4cd09dc663b524f7
+Subproject commit 05e931a2e818c9b50f4a4564f751accf7885034c