Update example data

[OriolAbril]

Description

The command we had in the docs didn't work, so I have tried deleting the folder and adding the subtree again now on the latest commit.

Checklist

• [x] Follows official PR format
• [x] Code style correct (follows pylint and black guidelines)
• [x] Changes are listed in changelog

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📚 Documentation preview 📚: https://arviz--2322.org.readthedocs.build/en/2322/

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Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 86.79%. Comparing base (3fc5962) to head (5a74c3b).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #2322 +/- ## ======================================= Coverage 86.79% 86.79% ======================================= Files 123 123 Lines 12722 12722 ======================================= Hits 11042 11042 Misses 1680 1680 ```

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