build(deps): bump jupyterlab from 3.6.7 to 3.6.8 in /binder

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:production
...

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

binder/Pipfile

@@ -26,7 +26,7 @@ pydeck = "==0.8.0"
 ipywidgets = "*"
 jupyterlab-widgets = "==1.1.7"
 ipykernel = "*"
-jupyterlab = "==3.6.7"
+jupyterlab = "==3.6.8"
 pyspark-extension = "==2.11.0.3.4"
 
 [requires]