chore: fix typos #4518

Job	Run time
clippy	1m 20s
check no_std	23s
check	22s
check no_std kzg-rs	27s
check serde	24s
docs	59s
check std	28s
fmt	10s
TyposCheck	6s
test stable --no-default-features	55s
test stable	46s
test stable --all-features	1m 24s
test beta --no-default-features	54s
test beta	1m 15s
test beta --all-features	1m 15s
test nightly --no-default-features	1m 54s
test nightly	1m 59s
test nightly --all-features	1m 58s
	16m 59s

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