Update git submodules

* Update docs/submodules/sdc.git from branch 'master'
  to 80a4b4a14a63509990bdbcb960538d30ae22a6e5
  - Add null test in ArtifactsOperations

    - Added if statement in `updateArtifactOnGraph` to account for the case where variable `artifactInst` has not been properly initialized

    Issue-ID: SDC-2919
    Signed-off-by: Chris Andre <chris.andre@yoppworks.com>
    Change-Id: I73fe3b3bcef59e5797a0f7cfe7b6894816d0d3fb

diff --git a/docs/submodules/sdc.git b/docs/submodules/sdc.git
index c39f8ff..80a4b4a 160000 (submodule)
--- a/docs/submodules/sdc.git
+++ b/docs/submodules/sdc.git
@@ -1 +1 @@
-Subproject commit c39f8ff9e9436d974f9d0021be04b0a925d6745d
+Subproject commit 80a4b4a14a63509990bdbcb960538d30ae22a6e5