Update git submodules

* Update docs/submodules/sdc.git from branch 'master'
  to 75dd0bbc0e78c8e41de9792123fafed466f8ecbe
  - Clean normatives file during mvn clean

    The configuration to clean the normatives.tar.gz was incorrect,
    so the file was not being cleaned up during mvn clean, which
    could create an inconsistent sdc-backend-init docker image.

    Change-Id: I15e3f4c49f404c147532c88c50f131cb61aea9c0
    Issue-ID: SDC-3041
    Signed-off-by: andre.schmid <andre.schmid@est.tech>

diff --git a/docs/submodules/sdc.git b/docs/submodules/sdc.git
index a1bd235..75dd0bb 160000 (submodule)
--- a/docs/submodules/sdc.git
+++ b/docs/submodules/sdc.git
@@ -1 +1 @@
-Subproject commit a1bd235fffc7c0685800b6f3d8289d143baa87d6
+Subproject commit 75dd0bbc0e78c8e41de9792123fafed466f8ecbe