chore(deps): bump tokio from 1.39.2 to 1.40.0 #4168

Job	Run time
check no_std	23s
clippy	1m 23s
check no_std optimism,kzg-rs	29s
check	23s
check serde	20s
docs	1m 18s
check std	18s
fmt	8s
TyposCheck	5s
test stable --no-default-features	1m 32s
test stable	1m 34s
test stable --all-features	1m 50s
test beta --no-default-features	2m 33s
test beta	2m 38s
test beta --all-features	2m 48s
test nightly --no-default-features	2m 6s
test nightly	2m 16s
test nightly --all-features	2m 21s
	24m 25s

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