Fix documentation of dirty and mark_dirty functions (#724) #2357

Job	Run time
Test Suite [default features]	2m 0s
MSRV Build [Rust 1.65]	4m 16s
Test Suite [default except content_size]	2m 6s
Test Suite [std + block)]	2m 14s
Test Suite [default + serde]	2m 5s
Build [debug feature]	38s
Test Suite [std + flexbox]	1m 58s
Test Suite [std + grid]	1m 58s
Test Suite [std (no algorithms)]	2m 1s
Test Suite [no features]	2m 6s
Build Benchmarks (w/ yoga)	1m 26s
Build Benchmarks	58s
Clippy	1m 18s
Documentation	54s
Test Fixture Formatting	34s
Rustfmt	8s
Markdown Lint	3s
Test Suite [alloc + all algorithms]	2m 9s
Test Suite [alloc + no algorithms]	1m 53s
	30m 45s

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