Bump jupyterlab from 4.3.8 to 4.4.9

Bumps [jupyterlab](https://github.com/jupyterlab/jupyterlab) from 4.3.8 to 4.4.9.
- [Release notes](https://github.com/jupyterlab/jupyterlab/releases)
- [Changelog](https://github.com/jupyterlab/jupyterlab/blob/main/RELEASE.md)
- [Commits](https://github.com/jupyterlab/jupyterlab/compare/@jupyterlab/lsp@4.3.8...@jupyterlab/lsp@4.4.9)

---
updated-dependencies:
- dependency-name: jupyterlab
  dependency-version: 4.4.9
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

dev-requirements-jl4.txt

@@ -1,4 +1,4 @@
 -r dev-requirements.txt
-jupyterlab==4.3.8
+jupyterlab==4.4.9
 jupyter_server==2.14.2
 notebook==7.3.3