Update example notebook

[adamltyson]

Updates to reflect changes in vedo.

Docs updated in https://github.com/brainglobe/brainglobe.github.io/pull/131

[codecov[bot]]

Codecov Report

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

Comparison is base (3003fda) 86.39% compared to head (8b2edd0) 86.31%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #311 +/- ## ========================================== - Coverage 86.39% 86.31% -0.09% ========================================== Files 26 26 Lines 1213 1213 ========================================== - Hits 1048 1047 -1 - Misses 165 166 +1 ```

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