Fix of fix.

tests/CI_docker/context/arosics_ci.docker

 FROM conda_pyenv:pinned_v0.1
 
-RUN /bin/bash -i -c "source /root/anaconda3/bin/activate ; \
+RUN /bin/bash -i -c "\
+    source /root/miniconda3/bin/activate ; \
     source activate py3; \
     conda env update -f /root/environment_arosics.yml"