Tracking improvements for the workflow to update to newer JupyterLab versions: https://github.com/jupyter/notebook/actions/workflows/upgrade-juypterlab-dependencies.yml

The workflow was originally added in #7281.

• open the PR automatically
• use the github-actions user to open the PR

• some logic to bump the dependency on the jupyterlab Python package. At least when we update to a new minor version. Or make that configurable in the workflow.

Example PR which updated to a patch release: https://github.com/jupyter/notebook/pull/7527/files