Dockerfile: Changed DD4hep repo back to official upstream

Since the PRs required to make DD4hep behave nicely in this image have been
merged, we can go back to the offical repo.

Dockerfile

@@ -146,15 +146,13 @@ RUN git clone https://github.com/iLCSoft/LCIO.git \
 ENV ROOT_INCLUDE_PATH=/usr/local/include
 
 # DD4hep
-#ENV DD4HEP_RELEASE=v01-03
-ENV DD4HEP_URL=https://github.com/decibelcooper/DD4hep.git \
-    DD4HEP_CHECKOUT=185b944c627fb66dc0d2f23d9551c0e5563b59ac
+ENV DD4HEP_CHECKOUT=ddbe5a9eb839953dc5ce396952556506cc600bcc
 
 RUN sudo pacman -S --noconfirm \
         boost \
 &&  sudo rm -rf /var/cache/pacman/pkg
 
-RUN git clone $DD4HEP_URL \
+RUN git clone https://github.com/AIDASoft/DD4hep.git \
 &&  cd DD4hep \
 &&  git checkout $DD4HEP_CHECKOUT \
 &&  cd .. \