chore: correct typo docs

[sky-coderay]

Minor typo fixed in docs

[codspeed-hq]

CodSpeed Performance Report

Merging #13492 will not alter performance

_{Comparing sky-coderay:main (d016b6a) with main (62bbc8b)}

Summary

✅ 73 untouched benchmarks
🆕 4 new benchmarks
⁉️ 4 dropped benchmarks

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

Benchmarks breakdown

	Benchmark	main	sky-coderay:main	Change
⁉️	range lookup`	611.1 µs	N/A	N/A
⁉️	any lookup`	19.7 ms	N/A	N/A
⁉️	`prefix set	preload size: 1000	input size: 1000	Vec with binary search lookup`
⁉️	`prefix set	preload size: 1000	input size: 1000	Vec with custom cursor lookup`
🆕	range lookup`	N/A	613.6 µs	N/A
🆕	any lookup`	N/A	19.9 ms	N/A
🆕	`prefix set	preload size: 1000	input size: 999	Vec with binary search lookup`
🆕	`prefix set	preload size: 1000	input size: 999	Vec with custom cursor lookup`