Update git submodules

* Update docs/submodules/sdc.git from branch 'master'
  to 7cd3f6bbd4524421f290aa6b5f89836bc98c8cbf
  - Importing VSP with node_type in separate file

    Import fails when a node_type referenced in the main template is defined in a separate yaml file in the csar even when that separate file is correctly imported in the main template

    Change-Id: I6abe074585c2ce592fe9bed7abe76f0856bcfe93
    Issue-ID: SDC-2850
    Signed-off-by: MichaelMorris <michael.morris@est.tech>

diff --git a/docs/submodules/sdc.git b/docs/submodules/sdc.git
index ccdff9d..7cd3f6b 160000 (submodule)
--- a/docs/submodules/sdc.git
+++ b/docs/submodules/sdc.git
@@ -1 +1 @@
-Subproject commit ccdff9dd945d15b537f922999a569deb9b08a2d6
+Subproject commit 7cd3f6bbd4524421f290aa6b5f89836bc98c8cbf