Bump jupyterlab from 4.1.2 to 4.1.8

Bumps [jupyterlab](https://github.com/jupyterlab/jupyterlab) from 4.1.2 to 4.1.8.
- [Release notes](https://github.com/jupyterlab/jupyterlab/releases)
- [Changelog](https://github.com/jupyterlab/jupyterlab/blob/@jupyterlab/lsp@4.1.8/CHANGELOG.md)
- [Commits](https://github.com/jupyterlab/jupyterlab/compare/@jupyterlab/lsp@4.1.2...@jupyterlab/lsp@4.1.8)

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

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

requirements-dev.txt

@@ -6,6 +6,6 @@ unify==0.5
 sphinx-autobuild==2021.3.14
 seaborn==0.13.2
 jupyter==1.0.0
-jupyterlab==4.1.2
+jupyterlab==4.1.8
 jupyter_contrib_nbextensions==0.7.0
 pystac_client==0.7.6