Remove pin on pytest-benchmark

[Cadair]

No description provided.

[codspeed-hq]

CodSpeed Performance Report

Merging #459 will degrade performances by 18.16%

_{Comparing pytest_benchmarks_5 (45ec9b0) with main (18b7e0b)}

Summary

⚡ 1 improvements
❌ 2 regressions
✅ 8 untouched benchmarks

⚠️ Please fix the performance issues or acknowledge them on CodSpeed.

Benchmarks breakdown

	Benchmark	main	pytest_benchmarks_5	Change
❌	test_dataset_compute_data_full_files	1.9 s	2.3 s	-16.03%
❌	test_dataset_compute_data_partial_files	1.6 s	2 s	-18.16%
⚡	test_generate_celestial	5.9 ms	5.3 ms	+11.24%

[Cadair]

It seems that the issue has been fixed.