We're currently running jupyterlab 3.4.8 though jupyterlab 3.5.0 is now available.
https://jupyterlab.readthedocs.io/en/stable/getting_started/changelog.html#v3-5
https://github.com/toolforge/paws/blob/ce2b1f59101e5eb978c2c04d138e704f1363e9fb/images/singleuser/Dockerfile#L49