Fix `clippy::doc_overindented_list_items` lints #501

Job	Run time
cargo check (msrv) (wasm32)	17s
cargo check (msrv) (windows-latest)	40s
cargo clippy (windows-latest)	51s
cargo clippy (wasm32)	30s
cargo doc	17s
cargo check (msrv) (macos-latest)	23s
cargo clippy (macos-latest)	27s
cargo check (msrv) (ubuntu-latest)	17s
cargo clippy (ubuntu-latest)	25s
formatting	29s
cargo miri	1m 54s
cargo test (windows-latest)	39s
cargo test (wasm32)	18s
typos	7s
cargo test (macos-latest)	22s
cargo test (ubuntu-latest)	15s
	8m 11s

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