Update git submodules

* Update docs/submodules/sdc.git from branch 'master'
  to 4aa20bc42b7bd98dde15f7594084669eb92412c2
  - Configuration file runtime reload

    Reloads the backend configuration file when the file
    listener catches a change.
    Forces validations errors when the configuration file
    could not be parsed.
    Remove not used configurations.

    Change-Id: Ic6fcb2b557d52ec53074c38ab8e0fcfa96e9be67
    Issue-ID: SDC-2758
    Signed-off-by: andre.schmid <andre.schmid@est.tech>

diff --git a/docs/submodules/sdc.git b/docs/submodules/sdc.git
index b2b6acc..4aa20bc 160000 (submodule)
--- a/docs/submodules/sdc.git
+++ b/docs/submodules/sdc.git
@@ -1 +1 @@
-Subproject commit b2b6accda7c04a5df5029dcf250b8138c231f38e
+Subproject commit 4aa20bc42b7bd98dde15f7594084669eb92412c2