try fix regression in jupyter

docker/jupyter-lab/Dockerfile

-FROM quay.io/jupyter/scipy-notebook:lab-4.3.3
+FROM quay.io/jupyter/scipy-notebook:latest
 
 USER root
 RUN --mount=type=cache,target=/var/cache/apt \

docker/jupyter-lab/requirements.txt

@@ -5,7 +5,9 @@ notebook-as-pdf
 PyPDF2==2.12.1 # until https://github.com/betatim/notebook-as-pdf/issues/40 hits a notebook-as-pdf release
 jupyterlab-git >= 0.50.0 # BSD-3
 jupyter-collaboration >= 3.0.0 # 3-Clause BSD
-jupyter_server_nbmodel[lab,rtc] # BSD-3
+
+# disabled as it breaks on JupyterLab 4.3.5 (cells do not run)
+#jupyter_server_nbmodel[lab,rtc] # BSD-3
 
 # high-level access to station components.
 # NB: tangostationcontrol will also install lofar-station-client. The latter