chore: use std::hint::black_box #97

Performance Regression: -18.86%

⚡ 3 improvements
❌ 10 regressions
✅ 154 untouched benchmarks

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

	Benchmark	`BASE`	`HEAD`	Change
❌	`a`	254.7 ns	281.4 ns	-9.48%
❌	`a`	254.7 ns	281.4 ns	-9.48%
❌	`fibo_iterative`	126.7 ns	156.1 ns	-18.86%
❌	`sum_fold`	254.4 ns	283.9 ns	-10.37%
❌	`sleep_1ms`	566.1 ns	595.3 ns	-4.9%
⚡	`from_elem[1024]`	1.9 µs	1.8 µs	+3.27%
⚡	`from_elem_decimal[1024]`	1.9 µs	1.8 µs	+3.27%
⚡	`mut_borrow`	895.8 ns	866.7 ns	+3.37%
❌	`sleep_100ns`	566.1 ns	595.3 ns	-4.9%
❌	`sleep_100us`	536.9 ns	566.1 ns	-5.15%
❌	`sleep_1ms`	536.9 ns	566.1 ns	-5.15%
❌	`sleep_1ns`	536.9 ns	566.1 ns	-5.15%
❌	`sleep_1us`	536.9 ns	566.1 ns	-5.15%