Update jupyterlab requirement from ==4.0.9 to ==4.0.12 (#2872)

Updates the requirements on [jupyterlab](https://github.com/jupyterlab/jupyterlab) to permit the latest version.
- [Release notes](https://github.com/jupyterlab/jupyterlab/releases)
- [Changelog](https://github.com/jupyterlab/jupyterlab/blob/@jupyterlab/lsp@4.0.12/CHANGELOG.md)
- [Commits](https://github.com/jupyterlab/jupyterlab/compare/@jupyterlab/lsp@4.0.9...@jupyterlab/lsp@4.0.12)

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

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pyproject.toml

@@ -95,7 +95,7 @@ pytest-cov = "==4.1.0"
 pytest-watch = "==4.2.0"
 grpcio-tools = "==1.60.0"
 mypy-protobuf = "==3.2.0"
-jupyterlab = "==4.0.9"
+jupyterlab = "==4.0.12"
 rope = "==1.11.0"
 semver = "==3.0.2"
 sphinx = "==6.2.1"