Update git submodules

* Update docs/submodules/sdc.git from branch 'master'
  to 615de28561aeb843e4fc18a1859b68a8164b17a4
  - Validates artifact configuration

    Validates if all the SDC base artifacts are configured.
    The base artifacts are provided by the ArtifactTypeEnum.

    Change-Id: Iffa38d6ba276014940afad71f7472bc8d730fcf8
    Issue-ID: SDC-2929
    Signed-off-by: andre.schmid <andre.schmid@est.tech>
  - Configure a new Artifact Type

    Centralizes artifact configuration in one yaml entry.
    Allow the configuration of a new artifact type without
    the need of code changes.
    The configuration file now is used as a source of
    artifacts types instead the artifact type enum.
    The enum will be used as a source of base artifact types
    and also in hard coded business rules.

    Change-Id: Id0383d9fca9bce0519a4d52a4ecb3a68c8713f0f
    Issue-ID: SDC-2754
    Signed-off-by: andre.schmid <andre.schmid@est.tech>

diff --git a/docs/submodules/sdc.git b/docs/submodules/sdc.git
index dc56692..615de28 160000 (submodule)
--- a/docs/submodules/sdc.git
+++ b/docs/submodules/sdc.git
@@ -1 +1 @@
-Subproject commit dc56692a4a307f378c827f017d2efbf754c223e0
+Subproject commit 615de28561aeb843e4fc18a1859b68a8164b17a4