Update binning notebook

[erik-werner]

• Fix crashes by renaming *_dim_0 to *_dim_2
• Make sampling deterministic
• Slightly modify some plots

• Notebook follows style guide https://docs.pymc.io/en/latest/contributing/jupyter_style.html
• PR description contains a link to the relevant issue:
  • a tracker one for existing notebooks (tracker issues have the "tracker id" label)
  • or a proposal one for new notebooks
• Check the notebook is not excluded from any pre-commit check: https://github.com/pymc-devs/pymc-examples/blob/main/.pre-commit-config.yaml

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📚 Documentation preview 📚: https://pymc-examples--651.org.readthedocs.build/en/651/

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