Fix failing examples in gallery

[padix-key]

No description provided.

[codspeed-hq]

CodSpeed Performance Report

Merging #720 will degrade performances by 89.47%

_{Comparing padix-key:docs (8e8c86e) with main (0acb143)}

Summary

⚡ 5 improvements
❌ 4 (👁 4) regressions
✅ 38 untouched benchmarks

Benchmarks breakdown

	Benchmark	main	padix-key:docs	Change
⚡	benchmark_indexing_from_sequences[None-KmerTable]	12.8 ms	10.1 ms	+26.36%
👁	benchmark_kmer_decomposition[None]	155 µs	193.9 µs	-20.02%
👁	benchmark_structural_alphabet_methods[to_protein_blocks]	8.8 ms	83.8 ms	-89.47%
⚡	benchmark_get_structure[bcif-True]	83.5 ms	75.2 ms	+11.02%
⚡	benchmark_get_structure[cif-False]	77 ms	68.2 ms	+12.89%
⚡	benchmark_get_structure[cif-True]	137.5 ms	123.4 ms	+11.43%
⚡	benchmark_serialize_pdbx[bcif]	84.2 ms	74.6 ms	+12.88%
👁	benchmark_set_structure[bcif-True]	28.2 ms	52.3 ms	-46.13%
👁	benchmark_set_structure[cif-True]	127.1 ms	143.6 ms	-11.45%

[padix-key]

The performance regressions are merely due to the different Python version in the CI environment, as no code related to the benchmarks has been changed.