fix pareto smoothing weights test

[n-kall]

Summary

Minor fix to test for log weight pareto smoothing

Copyright and Licensing

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license the submitted work under the following licenses:

• Code: BSD 3-clause (https://opensource.org/licenses/BSD-3-Clause)
• Documentation: CC-BY 4.0 (https://creativecommons.org/licenses/by/4.0/)

[paul-buerkner]

Thanks.

[github-actions]

This is how benchmark results would change (along with a 95% confidence interval in relative change) if a6ed9ef is merged into master:

•   :ballot_box_with_check:as_draws_array: 105ms -> 105ms [-1.35%, +0.43%]
•   :ballot_box_with_check:as_draws_df: 32.5ms -> 32.6ms [-1.4%, +1.86%]
•   :ballot_box_with_check:as_draws_list: 193ms -> 193ms [-2.46%, +2.48%]
•   :ballot_box_with_check:as_draws_matrix: 32.3ms -> 32.1ms [-2.31%, +0.67%]
•   :ballot_box_with_check:as_draws_rvars: 159ms -> 161ms [-1.13%, +3.81%]
•   :ballot_box_with_check:summarise_draws_100_variables: 724ms -> 726ms [-1.03%, +1.35%]
•   :ballot_box_with_check:summarise_draws_10_variables: 79.2ms -> 79.8ms [-0.67%, +2.16%]
  Further explanation regarding interpretation and methodology can be found in the documentation.