Update git submodules

* Update docs/submodules/sfc from branch 'master'
  - Merge "Removing Jim from the committer's list"
  - Removing Jim from the committer's list

    As agreed with Jim, he is standing down as committer

    Change-Id: I620535b4a352f254d555af300435ba19f5f47230
    Signed-off-by: Manuel Buil <mbuil@suse.com>

diff --git a/docs/submodules/sfc b/docs/submodules/sfc
index d0c29c4..21ef4c5 160000 (submodule)
--- a/docs/submodules/sfc
+++ b/docs/submodules/sfc
@@ -1 +1 @@
-Subproject commit d0c29c4566cb092ee15736704c36f3117e0bc22d
+Subproject commit 21ef4c5ada615aede24369da1e1c12cd4a6800b9