Unpin jupyterlab<4.2

[davidbrochart]

Checklist

• Used a personal fork of the feedstock to propose changes
• Bumped the build number (if the version is unchanged)
• Reset the build number to 0 (if the version changed)
• Re-rendered with the latest conda-smithy (Use the phrase @conda-forge-admin, please rerender in a comment in this PR for automated rerendering)
• Ensured the license file is being packaged.

@conda-forge-admin, please rerender

[conda-forge-admin]

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipe/meta.yaml) and found it was in an excellent condition.

[davidbrochart]

The failure is:

jupyter labextension list
JupyterLab v4.2.5
/home/conda/feedstock_root/build_artifacts/jupyter-collaboration_1729754796578/_test_env_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_plac/share/jupyter/labextensions
        jupyterlab_pygments v0.3.0 enabled OK (python, jupyterlab_pygments)
        @jupyter/collaboration-extension v2.1.4 enabled  X (python, jupyter_collaboration)


   The following extensions may be outdated or specify dependencies that are incompatible with the current version of jupyterlab:
        @jupyter/collaboration-extension

Which we also have with pip install jupyterlab jupyter-collaboration.

[davidbrochart]

Closing as conda-forge is doing the right thing here.
jupyter-collaboration v2.1.5 will fix the issue.