Bump Python version for benchmarks to 3.13

[bdraco]

Python 3.13.1 has been released. As its rare to see
performance changes in Python versions after .0, and
even more rare to see them after .1 its time to start
benchmarking against 3.13.1

[codspeed-hq]

CodSpeed Performance Report

Merging #79 will improve performances by 7.8%

_{Comparing benchmarks_py313 (0b8a5ea) with master (bf12040)}

Summary

⚡ 2 improvements
✅ 2 untouched benchmarks

Benchmarks breakdown

	Benchmark	master	benchmarks_py313	Change
⚡	test_cached_property_cache_hit	40.1 µs	37.2 µs	+7.8%
⚡	test_cached_property_cache_miss	116.2 µs	108.5 µs	+7.05%