Update git submodules

* Update docs/submodules/sfc from branch 'master'
  - Fix typos and other errors in documentation

    While reading the documentation, I found typos and other errors. This
    patchset fixes them.

    Change-Id: I2bf83a26da58845337dd77e56a8c77aa63084f2f
    Signed-off-by: Miguel Lavalle <malavall@us.ibm.com>

diff --git a/docs/submodules/sfc b/docs/submodules/sfc
index 483a4c6..a40da17 160000 (submodule)
--- a/docs/submodules/sfc
+++ b/docs/submodules/sfc
@@ -1 +1 @@
-Subproject commit 483a4c6862a56a183a61e61f7dcec6bd574e89b2
+Subproject commit a40da17faa6c0d2c7d2dcf43076c6a5b8491df4a