Add holocene to OP spec #4323

Job	Run time
check	18s
check no_std	19s
clippy	1m 22s
check serde	20s
check no_std optimism,kzg-rs	25s
check std	17s
docs	1m 15s
fmt	5s
test stable --no-default-features	1m 12s
TyposCheck	7s
test stable	1m 8s
test stable --all-features	2m 12s
test beta --no-default-features	1m 15s
test beta	1m 20s
test beta --all-features	2m 16s
test nightly --no-default-features	1m 18s
test nightly	1m 13s
test nightly --all-features	1m 55s
	18m 17s

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