Fix typos #2463

Job	Run time
cargo bench	43s
cargo +1.36 build (futures-{core, io, sink})	38s
cargo clippy	24s
cargo +stable build	42s
cargo doc	17s
cargo hack check --feature-powerset	2m 20s
cargo +beta build	42s
cargo fmt	10s
cargo +nightly build	40s
cargo minimal-versions build	26s
cargo miri test	8m 34s
cargo build --target thumbv7m-none-eabi	32s
cargo test -Z sanitizer=address	5m 40s
cargo build --target thumbv6m-none-eabi	25s
cargo +1.56 build	1m 11s
cargo test (ubuntu-latest)	3m 9s
cargo test (macos-latest)	4m 57s
cargo test -Z sanitizer=memory	4m 3s
cargo test (windows-latest)	4m 55s
cargo test -Z sanitizer=thread	2m 48s
cargo test (ubuntu-latest, aarch64-unknown-linux-gnu)	3m 17s
cargo test (ubuntu-latest, armv7-unknown-linux-gnueabihf)	6m 12s
cargo test (ubuntu-latest, armv5te-unknown-linux-gnueabi)	6m 34s
cargo test (ubuntu-latest, i686-unknown-linux-gnu)	3m 42s
	1h 3m 1s

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