Update cheatsheets

tldr/jupyter-lab

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# jupyter lab
+
+> Interactive development environment for Jupyter notebooks.
+> More information: <https://jupyterlab.readthedocs.io/en/stable/>.
+
+- Start JupyterLab:
+
+`jupyter lab`
+
+- Open a specific notebook:
+
+`jupyter lab {{path/to/notebook.ipynb}}`
+
+- Start JupyterLab in a specific directory:
+
+`jupyter lab --notebook-dir {{path/to/directory}}`
+
+- Start JupyterLab in debug mode:
+
+`jupyter lab --debug`