Bump jupyterlab from 3.6.7 to 3.6.8

Bumps [jupyterlab](https://github.com/jupyterlab/jupyterlab) from 3.6.7 to 3.6.8.
- [Release notes](https://github.com/jupyterlab/jupyterlab/releases)
- [Changelog](https://github.com/jupyterlab/jupyterlab/blob/main/CHANGELOG.md)
- [Commits](https://github.com/jupyterlab/jupyterlab/compare/@jupyterlab/vdom@3.6.7...@jupyterlab/vdom@3.6.8)

---
updated-dependencies:
- dependency-name: jupyterlab
  dependency-type: direct:development
...

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

requirements-dev.txt

@@ -1,7 +1,7 @@
 black==24.8.0
 flake8==7.1.1
 isort==5.13.2
-jupyterlab==3.6.7
+jupyterlab==3.6.8
 mypy==1.11.1
 nbexec==0.2.0
 pandas-stubs==2.2.2.240805