Bump jupyterlab version

Bump `jupyterlab` version from 3.4.3 to 4.3.4. This resolves two
security alerts:

1. HTML injection in Jupyter Notebook and JupyterLab leading to DOM
   Clobbering (CVE ID: CVE-2024-43805)
2. Authentication and CSRF tokens leak (CVE ID: CVE-2024-22421)

---

* Release notes: https://github.com/jupyterlab/jupyterlab/releases
* Changelog:
  https://github.com/jupyterlab/jupyterlab/blob/@jupyterlab/[email protected]/CHANGELOG.md
* Commits:
  https://github.com/jupyterlab/jupyterlab/compare/@jupyterlab/[email protected]...@jupyterlab/[email protected]

Signed-off-by: Dimitris Poulopoulos <[email protected]>

dockerfiles/notebooks/jupyter/requirements.txt

@@ -1,3 +1,3 @@
-jupyterlab==3.4.3
+jupyterlab==4.3.4
 notebook==6.4.12
 ipykernel==6.15.0