pin prompt-toolkit to compatible version in jupyter dockerfile

closes #9683

docker/Dockerfile.jupyter

@@ -1,8 +1,8 @@
 FROM freqtradeorg/freqtrade:develop_plot
 
 
-# Pin jupyter-client to avoid tornado version conflict
-RUN pip install jupyterlab jupyter-client==7.3.4 --user --no-cache-dir
+# Pin prompt-toolkit to avoid questionary version conflict
+RUN pip install jupyterlab "prompt-toolkit<=3.0.36" jupyter-client --user --no-cache-dir
 
 # Empty the ENTRYPOINT to allow all commands
 ENTRYPOINT []