Bump jupyterlab from 3.0.17 to 3.6.8

Bumps [jupyterlab](https://github.com/jupyterlab/jupyterlab) from 3.0.17 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/[email protected]...@jupyterlab/[email protected])

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

Signed-off-by: dependabot[bot] <[email protected]>

requirements.txt

@@ -2,7 +2,7 @@ numpy==1.21.*
 matplotlib==3.4.2
 scipy==1.7.*
 openturns>=1.16
-jupyterlab==3.0.17
+jupyterlab==3.6.8
 nbconvert==6.5.1
 black==22.3.*
 pre-commit