ci: disable benchmarks concurrency

[codspeed-hq[bot]]

CodSpeed Performance Report

Merging #17 will degrade performances by 74.32%

_{Comparing ci/disable-benchmarks-concurrency (38de55d) with main (e605ffc)}

Summary

🔥 19 improvements ❌ 10 regressions ✅ 35 untouched benchmarks

:warning: Please fix the performance issues or acknowledge them on CodSpeed.

Benchmarks breakdown

	Benchmark	main	ci/disable-benchmarks-concurrency	Change
❌	switch 2	239.3 µs	931.7 µs	-74.32%
🔥	test_recursive_cached_fibo_10	1,401.7 µs	839.8 µs	+66.91%
🔥	test_recursive_cached_fibo_30	639.1 µs	372.1 µs	+71.78%
❌	test_iterative_fibo_10	542.6 µs	970.9 µs	-44.12%
❌	test_iterative_fibo_100	995 µs	1,338.7 µs	-25.68%
🔥	test sync baz 10	2,099.8 µs	828.1 µs	×2.5
🔥	test async baz 100	2.2 ms	1.7 ms	+28.15%
🔥	test_recursive_fibo_10	2.4 ms	1.3 ms	+87.49%
🔥	test_recursive_cached_fibo_20	607.6 µs	456.4 µs	+33.12%
❌	test_recursive_cached_fibo_30	328.8 µs	413.5 µs	-20.49%
❌	test_iterative_fibo_10	1.1 ms	1.9 ms	-40.33%
❌	test_iterative_fibo_100	352.7 µs	430 µs	-17.98%
🔥	test sync baz 100	577.4 µs	260.8 µs	×2.2
❌	switch 2	307.7 µs	1,161 µs	-73.5%
🔥	switch 2	1,826.1 µs	255.9 µs	×7.1
🔥	test_recursive_cached_fibo_10	1.7 ms	1.4 ms	+22.94%
🔥	test_recursive_cached_fibo_20	550.1 µs	308.8 µs	+78.16%
🔥	test_recursive_cached_fibo_30	553.2 µs	320.1 µs	+72.82%
❌	test_iterative_fibo_10	770.6 µs	1,234.7 µs	-37.59%
🔥	test_iterative_fibo_100	496.1 µs	346.6 µs	+43.17%
❌	test sync baz 100	574.5 µs	785.8 µs	-26.89%
🔥	test async baz 10	1,457.9 µs	916 µs	+59.17%
🔥	test_recursive_fibo_10	1,267.5 µs	751.9 µs	+68.58%
🔥	test_recursive_cached_fibo_20	569.1 µs	308.6 µs	+84.45%
🔥	test_recursive_cached_fibo_30	447.1 µs	319.8 µs	+39.8%
❌	test_iterative_fibo_10	948.5 µs	1,170 µs	-18.94%
🔥	test_iterative_fibo_100	412.8 µs	346.6 µs	+19.11%
🔥	test sync baz 100	480.5 µs	253.3 µs	+89.67%
🔥	String#indexOf	440.7 µs	202.8 µs	×2.2