Try pinning pip to 23.0.1

As of 23.1, pip updated to no longer allow how all biosimulations projects are installed.

Dockerfile

@@ -45,7 +45,7 @@ RUN apt-get update -y \
 
 # Copy code for command-line interface into image and install it
 COPY . /root/Biosimulators_AMICI
-RUN pip install sympy
+RUN pip install pip==23.0.1
 RUN pip install /root/Biosimulators_AMICI \
     && rm -rf /root/Biosimulators_AMICI
 RUN pip install amici==${SIMULATOR_VERSION}